[SOLVED] Smtp relay access denied

[tempo]

Hello good people,

I'm very new to Proxmox Mail Gateway and have been figuring a few things through research. However, I just can get this issue out of the way.

I have an external service for sending data that requires anonymous smtp auth through port 25, I have whitelisted the required IP address in Mail Proxy>Networks section. Relay access is being denied/ the emails won't come through!

Also this is an on prem exchange.

Any suggestion or possible resolutions for this? I've included a log of my smtp test below.

Many thanks in advance



Connecting to mail server.
Connected.
220 mail.school.com ESMTP Proxmox
EHLO DESKTOP-7M2MD22
250-mail.school.com
250-PIPELINING
250-SIZE 31457280
250-VRFY
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-SMTPUTF8
250 CHUNKING
RSET
250 2.0.0 Ok
MAIL FROM: <service@school.com>
250 2.1.0 Ok
RCPT TO: <joe@abc.com>
554 5.7.1 <joe@abc.com>: Relay access denied

Error: SMTP protocol error. 554 5.7.1 <joe@abc.com>: Relay access denied.
Failed to send messageForcing disconnection from SMTP server.
QUIT
221 2.0.0 Bye
Disconnected.

 

[Stoiko Ivanov]

The trusted networks are only considered for mail arriving on the internal port - the probably simplest solution is to create a port-redirection rule in the firewall/router in front of PMG for that source-ip (to send traffic coming in on port 25 to pmg on port 26)

I hope this helps!

 

[tempo]

Thank you very much for the suggestion. I’m will try that shortly once I get off the road.

 

[tempo]

Thank you Stoiko Ivanov this seems to have resolved my issue!

 

[Stoiko Ivanov]

Glad that worked out