Relay email to internal server

[jfranco (Jean Franco)]

In NS7 I can easily forward mail to a particular domain to an internal server.

Now, trying in NS8 and I can see the message in RSPAMD but never gets to the intended server.

The message gets rejected with:

554 5.7.1 : Relay access denied

[LayLow]

Does the manual help ?

[jfranco (Jean Franco)]

Hi @LayLow ,

Thanks for the reply!

The config is really simple, you set the domain and where it needs to go.

The section you mentioned is about the clients that need to send emails, some without authentication. In my case I need to receive the email, filter spam and send to another server. But NS8 refuses as it’s not configured to receive email from a external domain (it should accept and forward to the configured IP or domain in the relay section).

Thanks,

[LayLow]

@jfranco

it should accept and forward to the configured IP or domain in the relay section

Fair enough, please allow some real guru’s to respond tomorrow

[mrmarkuz (Markus Neuberger)]

I could reproduce the relay access denied message when relaying wasn’t allowed on the internal server.
If you want to relay via port 25 without authentication to an internal server you may need to allow relay for the NS8 IP on the internal server (which in my test case also is an NS8).
If you use authentication, it should just work.

Here’s the recipient relay rule I used:

Now it’s possible to send a mail for example in Roundcube to user@ns8rockytest4.com and it’s relayed via 192.168.3.144.

@jfranco

In my case I need to receive the email, filter spam and send to another server.

Is it about the connectors in NS7? It’s working using imapsync but it doesn’t include the spam filter yet. Another way could be GitHub - mrmarkuz/ns8-fetchmail

[davidep (Davide Principi)]

@jfranco

In my case I need to receive the email, filter spam and send to another server.

Hi Jean, does this Howto help?

Relaying and Filtering Mail for Legacy Servers with NS8

Let’s see how to overcome an apparent NS8 Mail limitation to filter and relay messages to a backend mail server. This How-To requires some Linux shell knowledge. Why use NS8 as a relay-only SMTP server The NS8 Mail application provides anti-spam and anti-virus features that may not be present in your organisation’s mail server. NS8 Mail can be placed in front of it to improve security with an up-to-date and well-maintained mail filtering system. Brief History In NS7, it w…

[jfranco (Jean Franco)]

Many Thanks @davidep

That did it!

Best regards,

[jfranco (Jean Franco)]

Hi @mrmarkuz ,

Thank you for the reply!

In my case, doing the exact procedure as you mentioned, it refuses it.

I applied the commands suggested bu @davidep and it worked.

Now I’m about to test forwarding to external hosts as well.

Best regards,