MailCow not Receiving mails

uramacharles

I installed Mailcow server, It is sending out messages well to gmail. But when I try to send from gmail to the mail, gmail returns an error.
554 5.7.1 <>: Relay access denied

I have tried to edit the main.cf file in the postfix folder to
smtpd_recipient_restrictions = check_recipient_mx_access proxy:mysql:/opt/postfix/conf/sql/mysql_mbr_access_maps.cf,
permit_sasl_authenticated,
permit_mynetworks,
check_recipient_access proxy:mysql:/opt/postfix/conf/sql/mysql_tls_enforce_in_policy.cf

removed
reject_invalid_helo_hostname,
reject_unauth_destination

smtpd_sender_restrictions = reject_authenticated_sender_login_mismatch,
permit_mynetworks,
permit_sasl_authenticated

rremoved
reject_unlisted_sender,
reject_unknown_sender_domain

But it didn’t cause any change as the mail still fails. Please what do I do here ?

esackbauer

First of all, you should post the relevant part of the postfix log of mailcow. But before you do, set everything back to the defaults, otherwise its impossible to see what is broken.
Fiddling around with postfix configuration is not a good idea and can worsen things. It should work out of the box. You have to check the logs first.

technicise

I am facing similar issue.

postfix logs are given below…

12/10/2023, 17:02:26 info lost connection after RCPT from servercow.observer[157.90.202.7] 12/10/2023, 17:02:26 info NOQUEUE: reject: RCPT from servercow.observer[157.90.202.7]: 554 5.7.1 <servercow.observer[157.90.202.7]>: Client host rejected: Access denied; from=<relaytest@observo.servercow.de> to=<any@example.org> proto=ESMTP helo=<observo.servercow.de> 12/10/2023, 17:02:26 info improper command pipelining after EHLO from servercow.observer[157.90.202.7]: MAIL FROM: relaytest@observo.servercow.de\r\nRCPT TO: any@example.org\r\n 12/10/2023, 17:02:26 info Anonymous TLS connection established from servercow.observer[157.90.202.7]: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 12/10/2023, 17:02:26 info connect from servercow.observer[157.90.202.7] 12/10/2023, 17:02:06 info 704DC48E24: removed 12/10/2023, 17:02:06 info 704DC48E24: to=<***hna@technicise.in>, relay=hosted.mailcow.de[5.1.76.202]:25, delay=0.15, delays=0.02/0.01/0.06/0.06, dsn=5.7.1, status=bounced (host hosted.mailcow.de[5.1.76.202] said: 554 5.7.1 <krishna@technicise.in>: Relay access denied (in reply to RCPT TO command)) 12/10/2023, 17:02:06 info Trusted TLS connection established to hosted.mailcow.de[5.1.76.202]:25: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits)

sender logs are given below:
Message not delivered Your message couldn't be delivered to ***tact@technicise.net because the remote server is misconfigured. See technical details below for more information. The response from the remote server was: 554 5.7.1 <***tact@technicise.net>: Relay access denied

esackbauer

technicise technicise.net

technicise ***hna@technicise.in

Probably you have done some misconfiguration within mailcow with your domains. It seems you have 2.