[BlueOnyx:26381] Re: The Postfix learning curve continues

Michael Stauber mstauber at blueonyx.it
Mon Jul 31 12:37:15 -05 2023


Hi Chad,

> I'd tried setting the relay configuration previously, and it seems to 
> not be honored for some reason.  I went with the widest scope of my 
> network to start with, and also explicitly listed hostnames and IP 
> address of a specific system.  I set the following via the GUI, which 
> set /etc/postfix/access to show:
> 
> # cat access
> photos.bersche.com RELAY
> 172.18.170.206  RELAY
> 172.18  RELAY
> bersche.com     RELAY

Yeah, that looks good.

What is the exact error message in /var/log/messages on your server when 
you try to relay from another box?

That will tell us what to look for.

permit_sasl_authenticated,reject_non_fqdn_sender,reject_non_fqdn_recipient,reject_unknown_sender_domain,reject_unknown_recipient_domain,permit_mynetworks,reject_unauth_destination,reject_unauth_pipelining,reject_invalid_hostname,reject_non_fqdn_hostname,check_sender_access 
hash:/etc/postfix/access,permit
> smtpd_sender_restrictions = permit_mynetworks, 
> reject_unknown_sender_domain, check_sender_access hash:/etc/postfix/access

I'd like to see the maillog entry first that happens on error. It could 
as well be the "reject_unknown_sender_domain" entries. If the sending 
servers don't have DNS records that could lead to a block.

-- 
With best regards

Michael Stauber



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