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Drop the MTA-STS TLSRPT record unless set explicitly

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Joshua Tauberer 2020-09-21 15:56:27 -04:00
parent 853008ddcc
commit 51aedcf6c3
2 changed files with 3 additions and 8 deletions
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1
CHANGELOG.md
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@ -7,7 +7,6 @@ In Development
Mail:
* An MTA-STS policy for incoming mail is now published (in DNS and over HTTPS) when the primary hostname and email address domain both have a signed TLS certificate installed, allowing senders to know that an encrypted connection should be enforced.
* MTA-STS reporting is enabled with reports sent to administrator@ the primary hostname.
* The per-IP connection limit to the IMAP server has been doubled to allow more devices to connect at once, especially with multiple users behind a NAT.
DNS:

10
management/dns_update.py
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@ -351,14 +351,10 @@ def build_zone(domain, all_domains, additional_records, www_redirect_domains, en
("_mta-sts", "TXT", "v=STSv1; id=" + mta_sts_policy_id, "Optional. Part of the MTA-STS policy for incoming mail. If set, a MTA-STS policy must also be published.")
])
# Rules can be custom configured accoring to https://tools.ietf.org/html/rfc8460.
# Enable SMTP TLS reporting (https://tools.ietf.org/html/rfc8460) if the user has set a config option.
# Skip if the rules below if the user has set a custom _smtp._tls record.
if not has_rec("_smtp._tls", "TXT", prefix="v=TLSRPTv1;"):
tls_rpt_string = ""
tls_rpt_email = env.get("MTA_STS_TLSRPT_EMAIL", "postmaster@%s" % env['PRIMARY_HOSTNAME'])
if tls_rpt_email: # if a reporting address is not cleared
tls_rpt_string = " rua=mailto:%s" % tls_rpt_email
mta_sts_records.append(("_smtp._tls", "TXT", "v=TLSRPTv1;%s" % tls_rpt_string, "Optional. Enables MTA-STS reporting."))
if env.get("MTA_STS_TLSRPT_RUA") and not has_rec("_smtp._tls", "TXT", prefix="v=TLSRPTv1;"):
mta_sts_records.append(("_smtp._tls", "TXT", "v=TLSRPTv1; rua=" + env["MTA_STS_TLSRPT_RUA"], "Optional. Enables MTA-STS reporting."))
for qname, rtype, value, explanation in mta_sts_records:
if value is None or value.strip() == "": continue # skip IPV6 if not set
if not has_rec(qname, rtype):