We run our real mail through an enterprise system, but it does not allow relaying, so I looking to setup a mail server that can be used for our webservers, and other processes that need to send mail. Some systems goto customers, so currently a lot of mail is either being rejected to put into spam due to various reasons like no reverse dns, no spf, etc. so I am going to make those DNS records to a subdomain like notices.mydomain.com this way things are legit.
I know I don't need a real mail server on each server (some are behind load balancers, etc.) so as I think I have to do it would be;
1. Setup public mail server (what would be the best for a strictly send only mail server).
2. Setup local servers when they are sending mail to use him
I don't think I am missing much else, so are there any how-to's or at least some feedback on a best method?
Thanks.
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