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submitted 7 months ago by Flax_vert@feddit.uk to c/selfhosted@lemmy.world

I have a raspberry pi running postfix. I Realised unless I open port 25 I absolutely cannot receive emails (I have 587 open and can send but not receive them). However I heard there are scaries online which someone could potentially send emails from your server without consent. I believe as well my ISP doesn't block port 25. Is there anything I should do right now before opening port 25, or should everything be safe enough?

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[-] toikpi@feddit.uk 2 points 7 months ago

Have you ensured that your setup will pass email authentication processes?

It has been a long time since email from random hosts is accepted for forwarding or delivery. This Wikipedia may help https://en.wikipedia.org/wiki/Email_authentication

this post was submitted on 22 Apr 2024
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