refactor the mail setup scripts
As the scripts keep growing, it's time to split them up to keep them understandable. This splits mail.sh into mail-postfix.sh, mail-dovecot.sh, and mail-users.sh, which has all of the user database-related configurations shared by Dovecot and Postfix. Also from spamassassin.sh the core sieve configuration is moved into mail-dovecot.sh and the virtual transport setting is moved into mail-postfix.sh. Also revising one of the sed scripts in mail-dovecot to not insert a new additional # at the start of a line each time the script is run.
This commit is contained in:
Joshua Tauberer
parent
6f51b49671
commit
e713af5f5a
6 changed files with 366 additions and 278 deletions
116
setup/mail-dovecot.sh
Executable file
116
setup/mail-dovecot.sh
Executable file
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#!/bin/bash
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#
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# Dovecot (IMAP and LDA)
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#
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# Dovecot is *both* the IMAP server (the protocol that email applications
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# use to query a mailbox) as well as the local delivery agent (LDA),
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# meaning it is responsible for writing emails to mailbox storage on disk.
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# You could imagine why these things would be bundled together.
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#
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# As part of local mail delivery, Dovecot executes actions on incoming
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# mail as defined in a "sieve" script.
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#
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# Dovecot's LDA role comes after spam filtering. Postfix hands mail off
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# to Spamassassin which in turn hands it off to Dovecot. This all happens
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# using the LMTP protocol.
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source setup/functions.sh # load our functions
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source /etc/mailinabox.conf # load global vars
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# Install packages.
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apt_install \
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dovecot-core dovecot-imapd dovecot-lmtpd dovecot-sqlite sqlite3 dovecot-sieve
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# The dovecot-imapd dovecot-lmtpd packages automatically enable IMAP and LMTP protocols.
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# Set the location where we'll store user mailboxes.
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tools/editconf.py /etc/dovecot/conf.d/10-mail.conf \
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mail_location=maildir:$STORAGE_ROOT/mail/mailboxes/%d/%n \
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mail_privileged_group=mail \
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first_valid_uid=0
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# IMAP
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# Require that passwords are sent over SSL only, and allow the usual IMAP authentication mechanisms.
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# The LOGIN mechanism is supposedly for Microsoft products like Outlook to do SMTP login (I guess
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# since we're using Dovecot to handle SMTP authentication?).
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tools/editconf.py /etc/dovecot/conf.d/10-auth.conf \
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disable_plaintext_auth=yes \
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"auth_mechanisms=plain login"
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# Enable SSL, specify the location of the SSL certificate and private key files,
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# and allow only good ciphers per http://baldric.net/2013/12/07/tls-ciphers-in-postfix-and-dovecot/.
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tools/editconf.py /etc/dovecot/conf.d/10-ssl.conf \
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ssl=required \
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"ssl_cert=<$STORAGE_ROOT/ssl/ssl_certificate.pem" \
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"ssl_key=<$STORAGE_ROOT/ssl/ssl_private_key.pem" \
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"ssl_cipher_list=TLSv1+HIGH !SSLv2 !RC4 !aNULL !eNULL !3DES @STRENGTH"
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# Disable in-the-clear IMAP and POP because we're paranoid (we haven't even
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# enabled POP).
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sed -i "s/#port = 143/port = 0/" /etc/dovecot/conf.d/10-master.conf
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sed -i "s/#port = 110/port = 0/" /etc/dovecot/conf.d/10-master.conf
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# LDA (LMTP)
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# Enable Dovecot's LDA service with the LMTP protocol. It will listen
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# in port 10026, and Spamassassin will be configured to pass mail there.
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#
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# The disabled unix socket listener is normally how Postfix and Dovecot
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# would communicate (see the Postfix setup script for the corresponding
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# setting also commented out).
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#
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# Also increase the number of allowed IMAP connections per mailbox because
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# we all have so many devices lately.
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cat > /etc/dovecot/conf.d/99-local.conf << EOF;
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service lmtp {
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#unix_listener /var/spool/postfix/private/dovecot-lmtp {
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# user = postfix
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# group = postfix
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#}
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inet_listener lmtp {
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address = 127.0.0.1
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port = 10026
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}
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}
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protocol imap {
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mail_max_userip_connections = 20
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}
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EOF
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# Setting a postmaster_address seems to be required or LMTP won't start.
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tools/editconf.py /etc/dovecot/conf.d/15-lda.conf \
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postmaster_address=postmaster@$PRIMARY_HOSTNAME
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# SIEVE
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# Enable the Dovecot sieve plugin which let's us set a script that automatically moves
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# spam into the user's Spam mail filter. (Note: Be careful if we want to use multiple
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# plugins later.)
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#
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# The actual sieve script is copied into user mailboxes at the time the user account
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# is created. Our script moves spam into the user's Spam folder.
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sudo sed -i "s/#mail_plugins = .*/mail_plugins = \$mail_plugins sieve/" /etc/dovecot/conf.d/20-lmtp.conf
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# PERMISSIONS
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# Make the place for mailboxes.
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mkdir -p $STORAGE_ROOT/mail
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# Ensure configuration files are owned by dovecot and not world readable.
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chown -R mail:dovecot /etc/dovecot
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chmod -R o-rwx /etc/dovecot
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# Ensure mailbox files have a directory that exists and are owned by the mail user.
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mkdir -p $STORAGE_ROOT/mail/mailboxes
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chown -R mail.mail $STORAGE_ROOT/mail/mailboxes
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# Allow the IMAP port in the firewall.
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ufw_allow imaps
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# Restart services.
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service dovecot restart
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140
setup/mail-postfix.sh
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140
setup/mail-postfix.sh
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@ -0,0 +1,140 @@
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#!/bin/bash
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#
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# Postfix (SMTP)
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#
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# Postfix handles the transmission of email between servers
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# using the SMTP protocol. It is a Mail Transfer Agent (MTA).
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#
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# Postfix listens on port 25 (SMTP) for incoming mail from
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# other servers on the Internet. It is responsible for very
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# basic email filtering such as by IP address and greylisting,
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# it checks that the destination address is valid, rewrites
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# destinations according to aliases, and passses email on to
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# another service for local mail delivery.
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#
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# The first hop in local mail delivery is to Spamassassin via
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# LMTP. Spamassassin then passes mail over to Dovecot for
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# storage in the user's mailbox.
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#
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# Postfix also listens on port 587 (SMTP+STARTLS) for
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# connections from users who can authenticate and then sends
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# their email out to the outside world. Postfix queries Dovecot
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# to authenticate users.
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#
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# Address validation, alias rewriting, and user authentication
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# is configured in a separate setup script mail-users.sh
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# because of the overlap of this part with the Dovecot
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# configuration.
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source setup/functions.sh # load our functions
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source /etc/mailinabox.conf # load global vars
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# Install packages.
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apt_install postfix postgrey postfix-pcre
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# Basic Settings
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# Have postfix listen on all network interfaces, set our name (the Debian default seems to be localhost),
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# and set the name of the local machine to localhost for xxx@localhost mail (but I don't think this will have any effect because
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# there is no true local mail delivery). Also set the banner (must have the hostname first, then anything).
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tools/editconf.py /etc/postfix/main.cf \
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inet_interfaces=all \
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myhostname=$PRIMARY_HOSTNAME\
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smtpd_banner="\$myhostname ESMTP Hi, I'm a Mail-in-a-Box (Ubuntu/Postfix; see https://github.com/joshdata/mailinabox)" \
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mydestination=localhost
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# Outgoing Mail
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# Enable the 'submission' port 587 smtpd server and tweak its settings.
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# a) Require the best ciphers for incoming connections per http://baldric.net/2013/12/07/tls-ciphers-in-postfix-and-dovecot/.
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# but without affecting opportunistic TLS on incoming mail, which will allow any cipher (it's better than none).
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# b) Give it a different name in syslog to distinguish it from the port 25 smtpd server.
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# c) Add a new cleanup service specific to the submission service ('authclean')
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# that filters out privacy-sensitive headers on mail being sent out by
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# authenticated users.
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tools/editconf.py /etc/postfix/master.cf -s -w \
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"submission=inet n - - - - smtpd
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-o syslog_name=postfix/submission
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-o smtpd_tls_ciphers=high -o smtpd_tls_protocols=!SSLv2,!SSLv3
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-o cleanup_service_name=authclean" \
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"authclean=unix n - - - 0 cleanup
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-o header_checks=pcre:/etc/postfix/outgoing_mail_header_filters"
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# Install the `outgoing_mail_header_filters` file required by the new 'authclean' service.
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cp conf/postfix_outgoing_mail_header_filters /etc/postfix/outgoing_mail_header_filters
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# Enable TLS on incoming connections (i.e. ports 25 *and* 587) and
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# require TLS before a user is allowed to authenticate. This also makes
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# opportunistic TLS available on *incoming* mail.
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tools/editconf.py /etc/postfix/main.cf \
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smtpd_tls_security_level=may\
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smtpd_tls_auth_only=yes \
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smtpd_tls_cert_file=$STORAGE_ROOT/ssl/ssl_certificate.pem \
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smtpd_tls_key_file=$STORAGE_ROOT/ssl/ssl_private_key.pem \
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smtpd_tls_received_header=yes
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# When connecting to remote SMTP servers, prefer TLS and use DANE if available.
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# Postfix queries for the TLSA record on the destination MX host. If no TLSA records are found,
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# then opportunistic TLS is used. Otherwise the server certificate must match the TLSA records
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# or else the mail bounces. TLSA also requires DNSSEC on the MX host. Postfix doesn't do DNSSEC
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# itself but assumes the system's nameserver does and reports DNSSEC status. Thus this also
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# relies on our local bind9 server being present and smtp_dns_support_level being set to dnssec
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# to use it.
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tools/editconf.py /etc/postfix/main.cf \
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smtp_tls_security_level=dane \
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smtp_dns_support_level=dnssec \
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smtp_tls_loglevel=2
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# Incoming Mail
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# Pass any incoming mail over to a local delivery agent. Spamassassin
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# will act as the LDA agent at first. It is listening on port 10025
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# with LMTP. Spamassassin will pass the mail over to Dovecot after.
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#
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# In a basic setup we would pass mail directly to Dovecot like so:
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# tools/editconf.py /etc/postfix/main.cf virtual_transport=lmtp:unix:private/dovecot-lmtp
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#
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tools/editconf.py /etc/postfix/main.cf virtual_transport=lmtp:[127.0.0.1]:10025
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# Who can send outbound mail? The purpose of this is to prevent
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# non-authenticated users from sending mail that requires being
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# relayed elsewhere. We don't want to be an "open relay".
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#
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# permit_sasl_authenticated: Authenticated users (i.e. on port 587).
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# permit_mynetworks: Mail that originates locally.
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# reject_unauth_destination: No one else. (Permits mail whose destination is local and rejects other mail.)
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tools/editconf.py /etc/postfix/main.cf \
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smtpd_relay_restrictions=permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
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# Who can send mail to us? Some basic filters.
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#
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# reject_non_fqdn_sender: Reject not-nice-looking return paths.
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# reject_unknown_sender_domain: Reject return paths with invalid domains.
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# reject_rhsbl_sender: Reject return paths that use blacklisted domains.
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# permit_sasl_authenticated: Authenticated users (i.e. on port 587).
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# permit_mynetworks: Mail that originates locally.
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# reject_rbl_client: Reject connections from IP addresses blacklisted in zen.spamhaus.org
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# check_policy_service: Apply greylisting using postgrey.
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#
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# Notes:
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# permit_dnswl_client can pass through mail from whitelisted IP addresses, which would be good to put before greylisting
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# so these IPs get mail delivered quickly. But when an IP is not listed in the permit_dnswl_client list (i.e. it is not
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# whitelisted) then postfix does a DEFER_IF_REJECT, which results in all "unknown user" sorts of messages turning into
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# "450 4.7.1 Client host rejected: Service unavailable". This is a retry code, so the mail doesn't properly bounce.
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tools/editconf.py /etc/postfix/main.cf \
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smtpd_sender_restrictions="reject_non_fqdn_sender,reject_unknown_sender_domain,reject_rhsbl_sender dbl.spamhaus.org" \
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smtpd_recipient_restrictions=permit_sasl_authenticated,permit_mynetworks,"reject_rbl_client zen.spamhaus.org","check_policy_service inet:127.0.0.1:10023"
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# Increase the message size limit from 10MB to 128MB.
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tools/editconf.py /etc/postfix/main.cf \
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message_size_limit=134217728
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# Allow the two SMTP ports in the firewall.
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ufw_allow smtp
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ufw_allow submission
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# Restart services
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service postfix restart
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106
setup/mail-users.sh
Executable file
106
setup/mail-users.sh
Executable file
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#!/bin/bash
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#
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# User Authentication and Destination Validation
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#
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# This script configures user authentication for Dovecot
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# and Postfix (which relies on Dovecot) and destination
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# validation by quering an Sqlite3 database of mail users.
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source setup/functions.sh # load our functions
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source /etc/mailinabox.conf # load global vars
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# The database of mail users (i.e. authenticated users, who have mailboxes)
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# and aliases (forwarders).
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db_path=$STORAGE_ROOT/mail/users.sqlite
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# Create an empty database if it doesn't yet exist.
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if [ ! -f $db_path ]; then
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echo Creating new user database: $db_path;
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echo "CREATE TABLE users (id INTEGER PRIMARY KEY AUTOINCREMENT, email TEXT NOT NULL UNIQUE, password TEXT NOT NULL, extra);" | sqlite3 $db_path;
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echo "CREATE TABLE aliases (id INTEGER PRIMARY KEY AUTOINCREMENT, source TEXT NOT NULL UNIQUE, destination TEXT NOT NULL);" | sqlite3 $db_path;
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fi
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# User Authentication
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#####################
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# Have Dovecot query our database, and not system users, for authentication.
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sed -i "s/#*\(\!include auth-system.conf.ext\)/#\1/" /etc/dovecot/conf.d/10-auth.conf
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sed -i "s/#\(\!include auth-sql.conf.ext\)/\1/" /etc/dovecot/conf.d/10-auth.conf
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# Specify how the database is to be queried for user authentication (passdb)
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# and where user mailboxes are stored (userdb).
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cat > /etc/dovecot/conf.d/auth-sql.conf.ext << EOF;
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passdb {
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driver = sql
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args = /etc/dovecot/dovecot-sql.conf.ext
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}
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userdb {
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driver = static
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args = uid=mail gid=mail home=$STORAGE_ROOT/mail/mailboxes/%d/%n
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}
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EOF
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# Configure the SQL to query for a user's password.
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cat > /etc/dovecot/dovecot-sql.conf.ext << EOF;
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driver = sqlite
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connect = $db_path
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default_pass_scheme = SHA512-CRYPT
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password_query = SELECT email as user, password FROM users WHERE email='%u';
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EOF
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chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
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# Have Dovecot provide an authorization service that Postfix can access & use.
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# Drew Crawford sets the auth-worker process to run as the mail user, but we don't care if it runs as root.
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cat > /etc/dovecot/conf.d/99-local-auth.conf << EOF;
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service auth {
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unix_listener /var/spool/postfix/private/auth {
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mode = 0666
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user = postfix
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group = postfix
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}
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}
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EOF
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# And have Postfix use that service.
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tools/editconf.py /etc/postfix/main.cf \
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smtpd_sasl_type=dovecot \
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smtpd_sasl_path=private/auth \
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smtpd_sasl_auth_enable=yes
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# Destination Validation
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########################
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# Use a Sqlite3 database to check whether a destination email address exists,
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# and to perform any email alias rewrites in Postfix.
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tools/editconf.py /etc/postfix/main.cf \
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virtual_mailbox_domains=sqlite:/etc/postfix/virtual-mailbox-domains.cf \
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virtual_mailbox_maps=sqlite:/etc/postfix/virtual-mailbox-maps.cf \
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virtual_alias_maps=sqlite:/etc/postfix/virtual-alias-maps.cf \
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local_recipient_maps=\$virtual_mailbox_maps
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# SQL statement to check if we handle mail for a domain, either for users or aliases.
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cat > /etc/postfix/virtual-mailbox-domains.cf << EOF;
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dbpath=$db_path
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query = SELECT 1 FROM users WHERE email LIKE '%%@%s' UNION SELECT 1 FROM aliases WHERE source LIKE '%%@%s'
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EOF
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# SQL statement to check if we handle mail for a user.
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cat > /etc/postfix/virtual-mailbox-maps.cf << EOF;
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dbpath=$db_path
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query = SELECT 1 FROM users WHERE email='%s'
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EOF
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# SQL statement to rewrite an email address if an alias is present.
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cat > /etc/postfix/virtual-alias-maps.cf << EOF;
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dbpath=$db_path
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query = SELECT destination FROM aliases WHERE source='%s'
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EOF
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# Restart Services
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##################
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service postfix restart
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service dovecot restart
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268
setup/mail.sh
268
setup/mail.sh
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@ -1,268 +0,0 @@
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#!/bin/bash
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# SMTP/IMAP: Postfix and Dovecot
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################################
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# The SMTP server is listening on port 25 for incoming mail (mail for us) and on
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# port 587 for outgoing mail (i.e. mail you send). Port 587 uses STARTTLS (not SSL)
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# and you'll authenticate with your full email address and mail password.
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#
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# The IMAP server is listening on port 993 and uses SSL. There is no IMAP server
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# listening on port 143 because it is not encrypted on that port.
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# We configure these together because postfix's configuration relies heavily on dovecot.
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# Install packages.
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source setup/functions.sh # load our functions
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source /etc/mailinabox.conf # load global vars
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apt_install \
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postfix postgrey postfix-pcre \
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dovecot-core dovecot-imapd dovecot-lmtpd dovecot-sqlite sqlite3
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mkdir -p $STORAGE_ROOT/mail
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# POSTFIX
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#########
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# Have postfix listen on all network interfaces, set our name (the Debian default seems to be localhost),
|
||||
# and set the name of the local machine to localhost for xxx@localhost mail (but I don't think this will have any effect because
|
||||
# there is no true local mail delivery). Also set the banner (must have the hostname first, then anything).
|
||||
tools/editconf.py /etc/postfix/main.cf \
|
||||
inet_interfaces=all \
|
||||
myhostname=$PRIMARY_HOSTNAME\
|
||||
smtpd_banner="\$myhostname ESMTP Hi, I'm a Mail-in-a-Box (Ubuntu/Postfix; see https://github.com/joshdata/mailinabox)" \
|
||||
mydestination=localhost
|
||||
|
||||
# Enable the 'submission' port 587 smtpd server and tweak its settings.
|
||||
# a) Require the best ciphers for incoming connections per http://baldric.net/2013/12/07/tls-ciphers-in-postfix-and-dovecot/.
|
||||
# but without affecting opportunistic TLS on incoming mail, which will allow any cipher (it's better than none).
|
||||
# b) Give it a different name in syslog to distinguish it from the port 25 smtpd server.
|
||||
# c) Add a new cleanup service specific to the submission service ('authclean')
|
||||
# that filters out privacy-sensitive headers on mail being sent out by
|
||||
# authenticated users.
|
||||
tools/editconf.py /etc/postfix/master.cf -s -w \
|
||||
"submission=inet n - - - - smtpd
|
||||
-o syslog_name=postfix/submission
|
||||
-o smtpd_tls_ciphers=high -o smtpd_tls_protocols=!SSLv2,!SSLv3
|
||||
-o cleanup_service_name=authclean" \
|
||||
"authclean=unix n - - - 0 cleanup
|
||||
-o header_checks=pcre:/etc/postfix/outgoing_mail_header_filters"
|
||||
|
||||
# Install the `outgoing_mail_header_filters` file required by the new 'authclean' service.
|
||||
cp conf/postfix_outgoing_mail_header_filters /etc/postfix/outgoing_mail_header_filters
|
||||
|
||||
# Enable TLS and require it for all user authentication.
|
||||
tools/editconf.py /etc/postfix/main.cf \
|
||||
smtpd_tls_security_level=may\
|
||||
smtpd_tls_auth_only=yes \
|
||||
smtpd_tls_cert_file=$STORAGE_ROOT/ssl/ssl_certificate.pem \
|
||||
smtpd_tls_key_file=$STORAGE_ROOT/ssl/ssl_private_key.pem \
|
||||
smtpd_tls_received_header=yes
|
||||
|
||||
# When connecting to remote SMTP servers, prefer TLS and use DANE if available.
|
||||
# Postfix queries for the TLSA record on the destination MX host. If no TLSA records are found,
|
||||
# then opportunistic TLS is used. Otherwise the server certificate must match the TLSA records
|
||||
# or else the mail bounces. TLSA also requires DNSSEC on the MX host. Postfix doesn't do DNSSEC
|
||||
# itself but assumes the system's nameserver does and reports DNSSEC status. Thus this also
|
||||
# relies on our local bind9 server being present and smtp_dns_support_level being set to dnssec
|
||||
# to use it.
|
||||
tools/editconf.py /etc/postfix/main.cf \
|
||||
smtp_tls_security_level=dane \
|
||||
smtp_dns_support_level=dnssec \
|
||||
smtp_tls_loglevel=2
|
||||
|
||||
# Who can send outbound mail?
|
||||
# permit_sasl_authenticated: Authenticated users (i.e. on port 587).
|
||||
# permit_mynetworks: Mail that originates locally.
|
||||
# reject_unauth_destination: No one else. (Permits mail whose destination is local and rejects other mail.)
|
||||
tools/editconf.py /etc/postfix/main.cf \
|
||||
smtpd_relay_restrictions=permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
|
||||
|
||||
# Who can send mail to us?
|
||||
# reject_non_fqdn_sender: Reject not-nice-looking return paths.
|
||||
# reject_unknown_sender_domain: Reject return paths with invalid domains.
|
||||
# reject_rhsbl_sender: Reject return paths that use blacklisted domains.
|
||||
# permit_sasl_authenticated: Authenticated users (i.e. on port 587).
|
||||
# permit_mynetworks: Mail that originates locally.
|
||||
# reject_rbl_client: Reject connections from IP addresses blacklisted in zen.spamhaus.org
|
||||
# check_policy_service: Apply greylisting using postgrey.
|
||||
#
|
||||
# Notes:
|
||||
# permit_dnswl_client can pass through mail from whitelisted IP addresses, which would be good to put before greylisting
|
||||
# so these IPs get mail delivered quickly. But when an IP is not listed in the permit_dnswl_client list (i.e. it is not
|
||||
# whitelisted) then postfix does a DEFER_IF_REJECT, which results in all "unknown user" sorts of messages turning into
|
||||
# "450 4.7.1 Client host rejected: Service unavailable". This is a retry code, so the mail doesn't properly bounce.
|
||||
tools/editconf.py /etc/postfix/main.cf \
|
||||
smtpd_sender_restrictions="reject_non_fqdn_sender,reject_unknown_sender_domain,reject_rhsbl_sender dbl.spamhaus.org" \
|
||||
smtpd_recipient_restrictions=permit_sasl_authenticated,permit_mynetworks,"reject_rbl_client zen.spamhaus.org","check_policy_service inet:127.0.0.1:10023"
|
||||
|
||||
# Increase the message size limit from 10MB to 128MB.
|
||||
tools/editconf.py /etc/postfix/main.cf \
|
||||
message_size_limit=134217728
|
||||
|
||||
# In a basic setup we would handle all local mail delivery by passing
|
||||
# it directly to dovecot over LMTP. However when we setup spamassassin
|
||||
# we will instead pass mail to spampd which will in turn pass it off
|
||||
# to dovecot. So we will skip setting this here and instead set it in
|
||||
# spamassassin.sh.
|
||||
#tools/editconf.py /etc/postfix/main.cf virtual_transport=lmtp:unix:private/dovecot-lmtp
|
||||
|
||||
# Postfix will query dovecot for user authentication.
|
||||
tools/editconf.py /etc/postfix/main.cf \
|
||||
smtpd_sasl_type=dovecot \
|
||||
smtpd_sasl_path=private/auth \
|
||||
smtpd_sasl_auth_enable=yes
|
||||
|
||||
# Use a Sqlite3 database to check whether a destination email address exists,
|
||||
# and to perform any email alias rewrites.
|
||||
tools/editconf.py /etc/postfix/main.cf \
|
||||
virtual_mailbox_domains=sqlite:/etc/postfix/virtual-mailbox-domains.cf \
|
||||
virtual_mailbox_maps=sqlite:/etc/postfix/virtual-mailbox-maps.cf \
|
||||
virtual_alias_maps=sqlite:/etc/postfix/virtual-alias-maps.cf \
|
||||
local_recipient_maps=\$virtual_mailbox_maps
|
||||
|
||||
# Here's the path to the database.
|
||||
db_path=$STORAGE_ROOT/mail/users.sqlite
|
||||
|
||||
# SQL statement to check if we handle mail for a domain, either for users or aliases.
|
||||
cat > /etc/postfix/virtual-mailbox-domains.cf << EOF;
|
||||
dbpath=$db_path
|
||||
query = SELECT 1 FROM users WHERE email LIKE '%%@%s' UNION SELECT 1 FROM aliases WHERE source LIKE '%%@%s'
|
||||
EOF
|
||||
|
||||
# SQL statement to check if we handle mail for a user.
|
||||
cat > /etc/postfix/virtual-mailbox-maps.cf << EOF;
|
||||
dbpath=$db_path
|
||||
query = SELECT 1 FROM users WHERE email='%s'
|
||||
EOF
|
||||
|
||||
# SQL statement to rewrite an email address if an alias is present.
|
||||
cat > /etc/postfix/virtual-alias-maps.cf << EOF;
|
||||
dbpath=$db_path
|
||||
query = SELECT destination FROM aliases WHERE source='%s'
|
||||
EOF
|
||||
|
||||
# Create an empty database if it doesn't yet exist.
|
||||
if [ ! -f $db_path ]; then
|
||||
echo Creating new user database: $db_path;
|
||||
echo "CREATE TABLE users (id INTEGER PRIMARY KEY AUTOINCREMENT, email TEXT NOT NULL UNIQUE, password TEXT NOT NULL, extra);" | sqlite3 $db_path;
|
||||
echo "CREATE TABLE aliases (id INTEGER PRIMARY KEY AUTOINCREMENT, source TEXT NOT NULL UNIQUE, destination TEXT NOT NULL);" | sqlite3 $db_path;
|
||||
fi
|
||||
|
||||
# DOVECOT
|
||||
#########
|
||||
|
||||
# The dovecot-imapd dovecot-lmtpd packages automatically enable IMAP and LMTP protocols.
|
||||
|
||||
# Set the location where we'll store user mailboxes.
|
||||
tools/editconf.py /etc/dovecot/conf.d/10-mail.conf \
|
||||
mail_location=maildir:$STORAGE_ROOT/mail/mailboxes/%d/%n \
|
||||
mail_privileged_group=mail \
|
||||
first_valid_uid=0
|
||||
|
||||
# Require that passwords are sent over SSL only, and allow the usual IMAP authentication mechanisms.
|
||||
# The LOGIN mechanism is supposedly for Microsoft products like Outlook to do SMTP login (I guess
|
||||
# since we're using Dovecot to handle SMTP authentication?).
|
||||
tools/editconf.py /etc/dovecot/conf.d/10-auth.conf \
|
||||
disable_plaintext_auth=yes \
|
||||
"auth_mechanisms=plain login"
|
||||
|
||||
# Query our Sqlite3 database, and not system users, for authentication.
|
||||
sed -i "s/\(\!include auth-system.conf.ext\)/#\1/" /etc/dovecot/conf.d/10-auth.conf
|
||||
sed -i "s/#\(\!include auth-sql.conf.ext\)/\1/" /etc/dovecot/conf.d/10-auth.conf
|
||||
|
||||
# Configure how to access our Sqlite3 database. Not sure what userdb is for.
|
||||
cat > /etc/dovecot/conf.d/auth-sql.conf.ext << EOF;
|
||||
passdb {
|
||||
driver = sql
|
||||
args = /etc/dovecot/dovecot-sql.conf.ext
|
||||
}
|
||||
userdb {
|
||||
driver = static
|
||||
args = uid=mail gid=mail home=$STORAGE_ROOT/mail/mailboxes/%d/%n
|
||||
}
|
||||
EOF
|
||||
|
||||
# Configure the SQL to query for a user's password.
|
||||
cat > /etc/dovecot/dovecot-sql.conf.ext << EOF;
|
||||
driver = sqlite
|
||||
connect = $db_path
|
||||
default_pass_scheme = SHA512-CRYPT
|
||||
password_query = SELECT email as user, password FROM users WHERE email='%u';
|
||||
EOF
|
||||
chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
|
||||
|
||||
# Disable in-the-clear IMAP and POP because we're paranoid (we haven't even
|
||||
# enabled POP).
|
||||
sed -i "s/#port = 143/port = 0/" /etc/dovecot/conf.d/10-master.conf
|
||||
sed -i "s/#port = 110/port = 0/" /etc/dovecot/conf.d/10-master.conf
|
||||
|
||||
# Have dovecot provide authorization and LMTP (local mail delivery) services.
|
||||
#
|
||||
# We have dovecot listen on a Unix domain socket for these services
|
||||
# in a manner that made postfix configuration above easy.
|
||||
#
|
||||
# We also have dovecot listen on port 10026 (localhost only) for LMTP
|
||||
# in case we have other services that want to deliver local mail, namely
|
||||
# spampd.
|
||||
#
|
||||
# Also increase the number of allowed connections per mailbox because we
|
||||
# all have so many devices lately.
|
||||
cat > /etc/dovecot/conf.d/99-local.conf << EOF;
|
||||
service auth {
|
||||
unix_listener /var/spool/postfix/private/auth {
|
||||
mode = 0666
|
||||
user = postfix
|
||||
group = postfix
|
||||
}
|
||||
}
|
||||
service lmtp {
|
||||
unix_listener /var/spool/postfix/private/dovecot-lmtp {
|
||||
user = postfix
|
||||
group = postfix
|
||||
}
|
||||
inet_listener lmtp {
|
||||
address = 127.0.0.1
|
||||
port = 10026
|
||||
}
|
||||
}
|
||||
|
||||
protocol imap {
|
||||
mail_max_userip_connections = 20
|
||||
}
|
||||
EOF
|
||||
|
||||
# postmaster_address seems to be required or LMTP won't start
|
||||
tools/editconf.py /etc/dovecot/conf.d/15-lda.conf \
|
||||
postmaster_address=postmaster@$PRIMARY_HOSTNAME
|
||||
|
||||
# Drew Crawford sets the auth-worker process to run as the mail user, but we don't care if it runs as root.
|
||||
|
||||
# Enable SSL, specify the location of the SSL certificate and private key files,
|
||||
# and allow only good ciphers per http://baldric.net/2013/12/07/tls-ciphers-in-postfix-and-dovecot/.
|
||||
tools/editconf.py /etc/dovecot/conf.d/10-ssl.conf \
|
||||
ssl=required \
|
||||
"ssl_cert=<$STORAGE_ROOT/ssl/ssl_certificate.pem" \
|
||||
"ssl_key=<$STORAGE_ROOT/ssl/ssl_private_key.pem" \
|
||||
"ssl_cipher_list=TLSv1+HIGH !SSLv2 !RC4 !aNULL !eNULL !3DES @STRENGTH"
|
||||
|
||||
# PERMISSIONS / RESTART SERVICES
|
||||
|
||||
# Ensure configuration files are owned by dovecot and not world readable.
|
||||
chown -R mail:dovecot /etc/dovecot
|
||||
chmod -R o-rwx /etc/dovecot
|
||||
|
||||
# Ensure mailbox files have a directory that exists and are owned by the mail user.
|
||||
mkdir -p $STORAGE_ROOT/mail/mailboxes
|
||||
chown -R mail.mail $STORAGE_ROOT/mail/mailboxes
|
||||
|
||||
# Restart services.
|
||||
service postfix restart
|
||||
service dovecot restart
|
||||
|
||||
# Allow mail-related ports in the firewall.
|
||||
ufw_allow smtp
|
||||
ufw_allow submission
|
||||
ufw_allow imaps
|
||||
|
||||
|
|
@ -12,7 +12,7 @@
|
|||
source setup/functions.sh # load our functions
|
||||
|
||||
# Install packages.
|
||||
apt_install spampd razor pyzor dovecot-sieve dovecot-antispam
|
||||
apt_install spampd razor pyzor dovecot-antispam
|
||||
|
||||
# Allow spamassassin to download new rules.
|
||||
tools/editconf.py /etc/default/spamassassin \
|
||||
|
|
@ -21,19 +21,11 @@ tools/editconf.py /etc/default/spamassassin \
|
|||
# Configure pyzor.
|
||||
pyzor discover
|
||||
|
||||
# Hook into postfix. Replace dovecot with spampd as the mail delivery agent.
|
||||
tools/editconf.py /etc/postfix/main.cf virtual_transport=lmtp:[127.0.0.1]:10025
|
||||
|
||||
# Pass messages on to docevot on port 10026.
|
||||
# This is actually the default setting but we don't want to lose track of it.
|
||||
# We've already configured Dovecot to listen on this port.
|
||||
tools/editconf.py /etc/default/spampd DESTPORT=10026
|
||||
|
||||
# Enable the Dovecot sieve plugin which let's us set a script that automatically moves
|
||||
# spam into the user's Spam mail filter.
|
||||
# (Note: Be careful if we want to use multiple plugins later.)
|
||||
sudo sed -i "s/#mail_plugins = .*/mail_plugins = \$mail_plugins sieve/" /etc/dovecot/conf.d/20-lmtp.conf
|
||||
|
||||
# Enable the Dovecot antispam plugin to detect when a message moves between folders so we can
|
||||
# pass it to sa-learn for training. (Be careful if we use multiple plugins later.)
|
||||
sudo sed -i "s/#mail_plugins = .*/mail_plugins = \$mail_plugins antispam/" /etc/dovecot/conf.d/20-imap.conf
|
||||
|
|
|
|||
|
|
@ -182,7 +182,9 @@ EOF
|
|||
. setup/system.sh
|
||||
. setup/ssl.sh
|
||||
. setup/dns.sh
|
||||
. setup/mail.sh
|
||||
. setup/mail-postfix.sh
|
||||
. setup/mail-dovecot.sh
|
||||
. setup/mail-users.sh
|
||||
. setup/dkim.sh
|
||||
. setup/spamassassin.sh
|
||||
. setup/web.sh
|
||||
|
|
|
|||
Loading…
Reference in a new issue