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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[–] wildbus8979@sh.itjust.works 8 points 7 months ago* (last edited 7 months ago) (1 children)

Not sure about you latter point tbh. I run an email server, with nothing but grey listing and spamassassin and the amount of spam is absolutely minimal.

Proper config and fail2ban easily takes care of direct attacks.

Nevertheless, I wouldn't recommend it to anyone but the most determined.

[–] lud@lemm.ee 11 points 7 months ago

To be fair, they said that you would need anti spam software and you do use anti spam software.