Step 3: Add Submission Capability
Enable Postfix to accept submissions by mail clients.
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Goals: TBD
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Enable Submission service in Postfix
[…]# vim /etc/postfix/master.cf # ========================================================================== # Submission acces for clients: Different rules apply to mail clients. # Dedicated to MUA's only. submission inet n - n - - smtpd -o syslog_name=postfix/submission -o smtpd_tls_security_level=encrypt -o smtpd_sasl_auth_enable=yes # delegate authorization to dovecot here -o smtpd_sasl_type=dovecot -o smtpd_sasl_path=private/auth -o smtpd_sasl_security_options=noanonymous -o smtpd_tls_auth_only=yes ## restrictions here overwrite those in main.cf for this service only -o smtpd_client_restrictions=$mua_client_restrictions -o smtpd_helo_required=no -o smtpd_helo_restrictions=$mua_helo_restrictions -o smtpd_sender_restrictions=$mua_sender_restrictio= -o smtpd_relay_restrictions=$mua_relay_restrictions -o milter_macro_daemon_name=ORIGINATING ## Remove privacy relevant headers from mail clients. -o cleanup_service_name=submission-header-cleanup
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Continue editing and add Service submission-header-cleanup at the end of service list
... ... lmtp unix - - n - - lmtp anvil unix - - n - 1 anvil scache unix - - n - 1 scache postlog unix-dgram n - n - 1 postlogd # ==================================================================== # Add # Define Service submission-header-cleanup to remove MUA header # Add submission-header-cleanup unix n - n - 0 cleanup # Add -o header_checks=regexp:/etc/postfix/submission_header_cleanup # Add
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Configure Submission Header Cleanup
In "submission_header_cleanup" rules are stored according to which the submission service removes parts of the header supplied by clients (here privacy-relevant features).
[…]# vim /etc/postfix/submission_header_cleanup # /etc/postfix/submission_header_cleanup # Removes privacy relevant headers from # MTUAs emails /^Received:/ IGNORE /^X-Originating-IP:/ IGNORE /^X-Mailer:/ IGNORE /^User-Agent:/ IGNORE
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Add MUA specific rules to main configuration file
Add to the end of file
[…]# vim /etc/postfix/main.cf # ########################################## # # Restrictions for MUAs (Mail User Agents) # # ########################################## mua_client_restrictions = permit_mynetworks, permit_sasl_authenticated, reject ## mua_helo_restrictions empty by default here. For submission only, this overwrites the generell restrictions as defined elsewere. mua_helo_restrictions = mua_sender_restrictions = permit_mynetworks, reject_non_fqdn_sender, ## reject_sender_login_mismatch, permit_sasl_authenticated, reject mua_relay_restrictions = reject_non_fqdn_recipient, reject_unknown_recipient_domain, permit_mynetworks, permit_sasl_authenticated, reject
DONE.
You can either start with using the mail service or continue and add advanced spam and junk control and other capabilities.
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