diff --git a/README.md b/README.md
index 3f37734..565a24b 100644
--- a/README.md
+++ b/README.md
@@ -82,6 +82,7 @@ nano /etc/prosody/prosody.cfg.lua /etc/dovecot/dovecot.conf /etc/postfix/main.cf
 
 Create database tables, activate firewall and enable cron:
 ```
+postmap /etc/postfix/header_checks
 cd /var/www/mail && php setup.php && chmod +x /etc/rc.local && /etc/rc.local && systemctl enable mail-cron.timer
 ```
 
diff --git a/etc/postfix/body_checks b/etc/postfix/body_checks
deleted file mode 100644
index e69de29..0000000
diff --git a/etc/postfix/header_checks b/etc/postfix/header_checks
index a5667f8..1e8425b 100644
--- a/etc/postfix/header_checks
+++ b/etc/postfix/header_checks
@@ -1,2 +1,2 @@
-/^To:.*@[^@]*\.de-mail\.de/ REJECT "Sorry, you tried contacting a De-Mail Address. This is a special System by the German government, not compatible with E-Mail. More info here: https://www.cio.bund.de/Web/DE/Innovative-Vorhaben/De-Mail/de_mail_node.html"
+/^To:.*@[^@]*\.de-mail\.de/ REJECT "Sorry, you tried contacting a De-Mail Address. This is a special System by the German government, not compatible with E-Mail. More info here: https://de-mail.info/"
 /^(To|From).*@example\.com/    REJECT
diff --git a/etc/postfix/helo_checks b/etc/postfix/helo_checks
deleted file mode 100644
index 167865c..0000000
--- a/etc/postfix/helo_checks
+++ /dev/null
@@ -1 +0,0 @@
-DESKTOPRaihan REJECT
diff --git a/etc/postfix/main.cf b/etc/postfix/main.cf
index 690d590..665590b 100644
--- a/etc/postfix/main.cf
+++ b/etc/postfix/main.cf
@@ -68,7 +68,6 @@ smtpd_recipient_restrictions = check_policy_service inet:127.0.0.1:12340, permit
 smtpd_sender_restrictions = reject_sender_login_mismatch, check_sender_access inline:{{<> = REJECT}}, permit_sasl_authenticated
 smtpd_relay_restrictions = permit_sasl_authenticated, permit_auth_destination, reject_unauth_destination
 smtpd_sender_login_maps = proxy:mysql:/etc/postfix/sql/mysql_virtual_auth_maps.cf
-smtpd_helo_restrictions = check_helo_access hash:/etc/postfix/helo_checks
 
 # anti-spam settings
 smtpd_milters = inet:127.0.0.1:11332
@@ -76,7 +75,6 @@ non_smtpd_milters = inet:127.0.0.1:11332
 milter_default_action = tempfail
 milter_protocol = 6
 header_checks = regexp:/etc/postfix/header_checks
-body_checks = regexp:/etc/postfix/body_checks
 disable_vrfy_command = yes
 smtpd_discard_ehlo_keywords = silent-discard, dsn
 smtpd_delay_reject = yes