today in #runyourownmailserver

bounce message from microsoft;
550 5.7.1 Service unavailable, Client host blocked using Spamhaus

shit! what happened? did my box get shelled?

oh. that last update enabled ip6. thanks apt. ugh.

RE: https://mastodon.social/@indigoparadox/115494520716734286

Oh and #RunYourOwnMailServer

After running my newly set up email server with aggressive #fail2ban for about eight months the number of blocked IP is leveling out:

* Scanners (hitting Telnet, FTP, ...): ~20000/90 days
* Spam hosts (on two block lists): ~30/30 days
* SSH (Germany only, others end up as Scanners): ~10/7 days

My old server was flooded with login attempts on SSH and IMAP. Going dark on services like shodan with the scan trap was a game changer.

#RunYourOwnMailServer

PUH!

Ich dachte schon mein eigener E-Mail Server sei kaputt. Seit über 10 Tagen _keine einzige SPAM-Nachricht_! Und das bei einer E-Mail-Adresse, die seit 1995 aktiv ist.

Heute kamen endlich wieder welche herein, die die ordentliche Funktionsweise bestätigen.

Thank you, @mwl for your outstanding #RunYourOwnMailServer.

#sarcasmbutonlyhalf #spam

Edit: English translation in my reply.

Since I'm currently reading #RunYourOwnMailServer #RYOMS, the part about #DKIM reminded me about something I heard some time ago, and I managed to find it again. Concept somewhat similar to what #OTR does.
https://blog.cryptographyengineering.com/2020/11/16/ok-google-please-publish-your-dkim-secret-keys/
https://rya.nc/dkim-privates.html

With greetings and thanks to @mwl and @ryanc 😅

#email #mail #security #privacy

I'm reading #RunYourOwnMailServer #RYOMS by @mwl , and I'm thinking about what I know so far about #stalwart https://stalw.art/, and I can't figure what his opinion of it would be, I can see it going either way 😅
- "oh, nice, don't need to need with all those separate things and making them talk to each other"
- "eh, if it works for you, cool, I already have mine 🤷"
- "this abomination doesn't even follow Unix philosophy, I wonder what else it does wrong - no, I don't want to know"

#email

Just ran accross #runyourownmailserver today. I used to run my own postfix server many years ago.

Anyone else running their own email servers?

So I've finally started making my way through #RunYourOwnMailServer by @mwl

Even though I've read tutorials/articles/documentation of various bits and pieces over the years, I've always struggled to actually get any kind of fully functioning mail server. So far this book is doing a great job of demystifying all of the pieces and confusion I've had and bringing everything together. No doubt by the end of this I'll have a properly configured and functioning mail server.