Afternoon all, we have an older box which hosts all our corporate mail, but he's a bit old, small hard drive, etc. We have a new app which sends a lot of mail and 2 weekends in a row has killed the box.
So I want to play a bit with postfix, and have it installed and ready. The main question is can I have him 'send' all the mail out but keep the incoming since it's not much going to the primary? Naturally it's yes, but what do I need to look at record wise?
I know there are new things like spf, spoofing, etc and when someone get's that message from firstname.lastname@example.org
, there servers naturally reverse lookup, but he won't be the box that receives for that domain so will it simply not accept?
This is an old windows mail server set in it's ways, but both DNS and the new sending mail server is running under linux.