this post was submitted on 22 Apr 2024
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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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[–] Flax_vert 1 points 7 months ago (1 children)

What do you mean reserve DNS?

[–] slickJujitsu@lemmy.today 6 points 7 months ago (1 children)

Pretty sure they meant reverse dns :)

[–] TCB13@lemmy.world 5 points 7 months ago

Yes, reverse DNS. Typo there.