Hi Guys,
I've already posted this to the postfix mailing list and they made sure the error as the title suggest was generated by dovecot and not the other way around. I have an almost perfectly working multi domain mail server running dovecot+postfix+mysql+postfixadmin behind pfsense, when we transferred office, issues arose, suddenly users using email clients like thunderbird/outlook suddenly can't send mail when outside the office and instead gets an smtp denied or worst a mail undeliverable error. The mail undeliverable error was that the postmaster user is unknown yet I've created the alias using postfixadmin. I've made repeated test and sent mail directly to the postmaster and the email was received by the intended user, I'm stumped and have no idea to fix this.
Hope you can help me, TIA.
Here's the output of dovecot -n:
dovecot -n # /etc/dovecot.conf base_dir: /var/run/dovecot/ log_timestamp: %Y-%m-%d %H:%M:%S ssl_cert_file: /etc/postfix/ssl/mail-cert.pem ssl_key_file: /etc/postfix/ssl/mail-key.pem login_dir: /var/run/dovecot//login login_executable(default): /usr/libexec/dovecot/imap-login login_executable(imap): /usr/libexec/dovecot/imap-login login_executable(pop3): /usr/libexec/dovecot/pop3-login first_valid_uid: 150 last_valid_uid: 150 mail_extra_groups: mail mail_location: maildir:/home/virtualmail/%d/%u maildir_copy_with_hardlinks: yes mail_executable(default): /usr/libexec/dovecot/imap mail_executable(imap): /usr/libexec/dovecot/imap mail_executable(pop3): /usr/libexec/dovecot/pop3 mail_plugin_dir(default): /usr/lib/dovecot/imap mail_plugin_dir(imap): /usr/lib/dovecot/imap mail_plugin_dir(pop3): /usr/lib/dovecot/pop3 pop3_client_workarounds(default): pop3_client_workarounds(imap): pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh auth default: mechanisms: plain login digest-md5 user: nobody passdb: driver: sql args: /etc/dovecot-sql.conf userdb: driver: sql args: /etc/dovecot-sql.conf socket: type: listen client: path: /var/run/dovecot/auth-client mode: 432 user: postfix group: mail master: path: /var/run/dovecot/auth-master mode: 432 user: virtualmail group: mail