this post was submitted on 25 Nov 2023
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Nay, emphatically. Out of the box, a new SMTP server is treated by peers as yet another spam delivery vehicle. You have to prove to the world you're not a fly-by-night spammer. There are certain things you have to do with your domain's MX record, as well as in terms of SMTP server configuration. Oh, and if you're ever caught with an open relay on port 25, that will get you blacklisted instantaneously...