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Cake day: January 1st, 2024

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  • First layer is done by Postscreen (by Postfix). It watches bots misbehaving, check blackhole DNS and disconnects them. Fail2ban takes care of bots who cause errors and warnings in logs and bans them. Third layer is SPF and DKIM. If it does not match, it’s getting flagged.

    If someone conforms to protocols and passes the tests, there is still rspamd on the fourth layer. It does zillions of checks on the metadata and additionally learns via bayes. Dovecot moves all the crap to Junk and inserts the valid mails into their proper folders.

    The fifth layer is me. If some junk mail arrives in the inbox, I move it to Junk manually and Dovecot tells rspamd to learn it as spam.




  • Suzune@ani.socialtoSelfhosted@lemmy.worldremoved a homeplug
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    2 months ago

    If you use these powerline plugs, your house is also a huge antenna.

    My internet access dropped occasionally until a telcom guy found the culprit. It was a neighbor using a Devolo powerlan adapter.

    So yes, don’t use these. The only useful frequency in power cables is 50 or 60 Hz.








  • Suzune@ani.socialtoSelfhosted@lemmy.worldWhat I host myself
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    3 months ago

    Not really. Postfix is very robust against attackers and knows to how to deal with bots by default. It makes sense to also configure SPF, DKIM and DMARC for your own safety.

    If you want to stop the attackers from hammering, you can also add fail2ban.

    If you want to avoid spam, you can attach a spamfilter to the delivery agent and let Sieve do the rest.

    I’ve been running my postfix/dovecot combo using 4 mail domains for over 5 years without any problems. It’s simply fantastic.