Smarthost and Postfix

Business / Enterprise Security Products & Services Comodo AntiSpam Gateway - Hosted Anti Spam Service
1

I am setting up my own email server for the first time and I am trying to figure out how to how to setup the smarthost with Postfix. I read in the pdf guide on how to enable the relayhost in main.cf, but I am getting all mail returned with:

Action: failed
Status: 5.0.0
Remote-MTA: dns; mxsrv1.spamgateway.comodo.com
Diagnostic-Code: smtp; 550 message submission is for authorised users only!

I’m sure I should be using Transport and the sasl_passwd file, but what credentials and how should it be setup? Can I use one set of credentials or do I have to have them for every different outgoing email address?

2

Hi splitzero,

More of an MS Exchange guy myself but you can try adding your outgoing IP address in the Outgoing users container. I.e., open Outgoing users, add a line [IPADDRESS]@[DOMAINNAME].

I’ll ask the ASG devs if they can offer any suggestions too.

Regards,
Michel.

3

I’ll give it a try and let you know how it goes.

4

This trick seemed to work. All mail is now being sent with no authentication issues. I am getting an error that seems to be related to TLS and my self-signed certificate, but the mails are sending anyway.

 certificate verification failed for mxsrv1.spamgateway.comodo.com[50.23.158.210]:587: self-signed certificate