SMTP HELO Record When Relaying
Posted on 2011-03-21
I have a quick question. I am using SMTP2GO to send emails from my in-office server (my server sends automatic emails from my accounting software by connecting to this 3rd party SMTP).
I just figured out I was havign a mail delivery issue that I believe is caused by the server identifying itself as 127.0.0.1 in the HELO portion of the header.
As you can see in the server log below:
2011-03-19 03:35:05 1Q0mwS-0001q6-Sb <= firstname.lastname@example.org H=79-151-113-112-philadelphia.hfc.comcastbusiness.net ([127.0.0.1]) [126.96.36.199] P=esmtpa
I send from a separate IP, say 188.8.131.52.5 which is different from my site, mysite.com located at IP 184.108.40.206.10 .
Should I use my FQDN mysite.com OR the local server's ip? I am sending from email@example.com but it's not from the site's IP (it is listed in the site's SPF records, however).