Mailcow-dockerized: Relay access denied

[thomas126]

I've git a running mailcow instance working fine. Just added another domain to it and set all dns settings for it forwarding mx to the main domain where the server is running. I also set an alias of domain b mail account forwarding to domain a account. When I sent an email form an external server to the domain b mail address it should be send to domain a server forwarding the mail to the domain a mail address. I am receiving the following error:

Recipient address: [email protected]
Reason: Remote SMTP server has rejected address
Diagnostic code: smtp;554 5.7.1 mail@domain.b: Relay access denied
Remote system: dns;mail.domain.a (TCP|17.172.80.98|46347|104.248.42.190|25) (mail.domain.a ESMTP Postfix)

Is that a dns error or where is the problem?

[mitchellurgero]

What do you mean forward? Are you forwarding from an email account or did you setup domain forwarding in the admin panel? You should not be relaying openly.

What are you trying to do?

[thomas126]

All setup in mailbox itself. I have added two domains in the webinterface. And one mail address of domain b is alias of domain a. Frankly mails send to that alias are being rejected...

[mitchellurgero]

That's strange, I'll try to replicate the issue on my end, in the mean time can you send any more logs?

[thomas126]

postfix-mailcow_1 | Oct 23 12:01:39 mail postfix/smtpd[18919]: connect from st11p00im-asmtp004.me.com[17.172.80.98]
postfix-mailcow_1 | Oct 23 12:01:39 mail postfix/smtpd[18919]: Anonymous TLS connection established from st11p00im-asmtp004.me.com[17.172.80.98]: TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)
postfix-mailcow_1 | Oct 23 12:01:39 mail postfix/smtpd[18919]: NOQUEUE: reject: RCPT from st11p00im-asmtp004.me.com[17.172.80.98]: 554 5.7.1 mail@domain.b: Relay access denied; from=[e-mail] to=mail@domain.b proto=ESMTP helo=
postfix-mailcow_1 | Oct 23 12:01:39 mail postfix/smtpd[18919]: disconnect from st11p00im-asmtp004.me.com[17.172.80.98] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 quit=1 commands=5/7

[andryyy]

I don't quite understand. Can you post the output of this? =>

source mailcow.conf ; docker-compose exec mysql-mailcow mysql -u${DBUSER} -p${DBPASS} ${DBNAME} -e "select * from domain; select * from alias_domain;"

[mitchellurgero]

How are you using icloud.com as a domain in Mailcow? You do not own that domain.

[andryyy]

Yes, good catch, didn't see that.

[thomas126]

I am not. What I am doing is sending an email from my iCloud account to mailcow. There it gets denied. Even though the addresser is an alias of a mailbox within Mailcow...

Interesting is that I am able to send a mail from within mailcow to the same adress (the alias) which is then correctly forwarded!

[andryyy]

Can you please still post the output of the command above? I don't understand your text in the first post at all. :-/

[mitchellurgero]

What I am doing is sending an email from my iCloud account to mailcow. There it gets denied. Even though the addresser is an alias of a mailbox within Mailcow

Oh, That's not what was explained before, but that's fine. Now that I know this information I can test more since it's an external -> internal forward not an internal <-> internal forward.

[thomas126]

Sorry that I didn’t clear it up in the first place. So let me try again. I have mailcow running on a server with the domain mail.test.de. There is a mail account running named [email protected]. That one is working fine. I also setup another domain test.me and created an alias called [email protected] which is supposed to forward all mails to the first mailbox: [email protected]. From within mailcow it’s working fine. When trying to send an email from another mail service to [email protected] it gets denied by the server.

Is that now clearer? Thanks for all your help!

[mitchellurgero]

Create a dummy mail account for test.me and see if that helps.

[thomas126]

okay so I tried with a dummy account. The mail still gets rejected...

[mitchellurgero]

Try removing both the mailbox, and the alias and readd them, mailbox first. Once the alias is created, login as the mailbox the alias is assigned to and confirm you can send as the alias. Once you can confirm that (Done in SOGo settings I believe) then send the alias an email.

[thomas126]

I already did delete the alias. There was an error. Its not possible to have an alias setup together with a mail box using the name name. It set it up within mailcow settings web ui not sogo...

[mitchellurgero]

OK Do this:

Make new mailbox: [email protected]
THEN make an alias: [email protected] (Point to [email protected])

[mitchellurgero]

Mailbox name and alias name CANNOT be the same just FYI.

[thomas126]

still not working. I really have no idea what is going on. I also tried to send me another mail to a third domain which is working just fine. Checked the dns settings and they are basically the same so it should work too...

[thomas126]

Wow sorry guys. I just checked all settings in mailcow again because I didnt understand the error and I noticed the domain was set as inactive. So sorry for all the misunderstandings! But thanks for all your help.

[andryyy]

Asked two times about the SQL data, still no info... I cannot help you then.

[andryyy]

That's exactly why we needed the SQL data. It prints backupmx (that was my guess) and the active state.

[thomas126]

sorry again andryyy. Thanks for your help anyway!