Hey guys.
This is a personal question for my homelab, nothing business critical, not even always a purpose to what I am doing other than learning and trying out software.
I know there are alternative ways to do something, I'm open to suggestions but ultimately I want to see this one to the end too.
So I am trying out something called Artica
I believe I currently have everything configured correctly, (end game is a smtp relay to a different port.)
I currently have mail.domain.ca and I am adding mail-store1.domain.ca
Mail is coming in and being rejected for:
NOQUEUE: reject: RCPT from mail.example.ca[EXAMPLE IP]: 451 4.3.5 : Helo command rejected: Server configuration error; from= to= proto=ESMTP helo=
So looking deeper it looks like its failing on reverse DNS.
So using some google I'm being told to go to where my name server is hosted, so I went to them and got this response:
*Hello,
Reverse DNS is already configured for the shared IP address you are on. If you need a custom rDNS for your domain or such (if that's what they're asking), you would need a dedicated IP address for your site, which we don't do for free.
The current IP has rDNS though, so it shouldn't really be giving you issues. *
I currently have mail.domain.ca working just fine but I would love to get this relay set up, for knowledge, and to try to minimize downtime.
After this I am going to try postfix as well but I would love to get this one up and running.
Anyone have any hints or tips why my reverse DNS wouldnt be working?
I have access to cpanel for whatever DNS or MX changes need to be made.
So far I've added an A record and the MX record.
Thanks guys!