Question

Postfix not receiving mail and not finding any error messages.

I have postfix and dovecot installed on Debian. I have my droplet named as an FQDN (mxwsrv1.cbuchanon.org). I have an A record for mail.cbuchanon.org pointing to the IP of my droplet. I have an MX record pointing cbuchanon.org to mail.cbuchanon.org. The host name on the server shows as mxwsrv1.

Initially, I had the port blocked and could see Google trying to connect when I sent e-mails through gmail. I opened the port and that cleared the error. I’ve checked that mail.cbuchanon.org points back to my server IP and am coming up empty as to how else I could trace where the issue is occurring. Any guidance would be greatly appreciated.

alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases append_dot_mydomain = no biff = no #broken_sasl_auth_clients = yes #myorigin = /etc/mailname inet_interfaces = all mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/conf.d/01-mail-stack-delivery.conf -m “${EXTENSION}” mailbox_size_limit = 0 myorigin = /etc/mailname readme_directory = no recipient_delimiter = + relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = yes smtpd_sasl_path = private/dovecot-auth smtpd_sasl_security_options = noanonymous smtpd_sasl_local_domain = $myhostname smtpd_sasl_type = dovecot smtpd_tls_auth_only = yes smtpd_tls_received_header = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache tls_random_source = dev:/dev/urandom

#myhostname = mxwsrv1.cbuchanon.org myhostname = mail.cbuchanon.org #mydestination = $myhostname, cbuchanon.org, mxwsrv1.cbuchanon.org, localhost.cbuchanon.org, localhost mydestination = localhost, mail.cbuchanon.org, localhost.cbuchanon.org mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mydomain=cbuchanon.org

smtpd_banner = $myhostname ESMTP smtpd_helo_required = yes smtpd_helo_restrictions = permit_mynetworks, reject_non_fqdn_helo_hostname, reject_invalid_helo_hostname, reject_unknown_helo_hostname, permit smtpd_recipient_restrictions = reject_unknown_client_hostname, reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_invalid_hostname, reject_non_fqdn_sender smtpd_sender_restrictions = reject_unknown_sender_domain, reject_sender_login_mismatch smtpd_sender_login_maps = $virtual_mailbox_maps

unknown_address_reject_code = 550 unknown_hostname_reject_code = 550 unknown_client_reject_code = 550


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Accepted Answer

I figured it out. I mistakenly installed sendmail after installing postfix and the server was trying to use sendmail as the MTA. Thank [insert favorite deity or divinity here] I had a snapshot to revert back to.

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