For #email configuration and #security check, the European Commission provides a great tool: MECSA https://mecsa.jrc.ec.europa.eu/en/
conclusion: I still have some improvements to implement on my own server
#sysadmin #linux #postfix #DKIM #DMARC #DNSSEC #selfhosting

#sysAdmin #Postfix
Ah, je viens d'avoir le "unexpected attribute smtputf8 from xxx socket (expecting: sendopts)" Voilà ce qui arrive quand on ne lit pas les release notes.
(Executive summary : redémarrez Postfix.)

#fedihelp , please: I'm #selfhosting #dovecot and #postfix and running out of disk space with my mails reaching back into last century. I'd like to remove the oldest ones and keep an archive of any kind on a different host. What would be the easiest way to achieve that?
Maybe just imap-sync to some special maildir?

Edit:typo

trying to set up a #mail server with #postfix and #dovecot. so far other devices don't want to connect to dovecot, and while I can send emails, gmail specifically refuses to accept them.
Now I don't know if my settings are wrong, or if they are right and gmail is just needs more time to see my dkim and spf settings are correct.

Postfix 3.10 released with support for OpenSSL 3.5 post-quantum cryptography and for the TLSRPT protocol, logging changes

https://www.postfix.org/announcements/postfix-3.10.0.html

Going to FOSDEM? Join me at the „modern email“-track https://fosdem.org/2025/schedule/track/modern-email/ and listen to my presentation on TLSRPT: https://fosdem.org/2025/schedule/event/fosdem-2025-5776-tlsrpt-comes-to-open-source/

My company @sys4 developed a free low-level C-library and a tlsrpt-reporter so TLSRPT can come to Open Source. Together with Wietse Venema we’ve implemented it in Postfix. The upcoming version 3.10 will ship it: https://www.postfix.org/TLSRPT_README.html. Documentation to show you how to set the report service up and use it is on the way.#postfix #TLSRPT

I #selfhost my #email, which means that I can have any email addresses I want. I have a domain I use where whatever@domain will land in my inbox. I use distinct emails for all kinds of web sites. amazon@domain and ebay@domain and so on.

Today I got a message from some small company that helps people rent apartments. They write 'Your email address flagged up in our system, can you supply another email address please?'. I wrote back using my made-up email address as a From address. No. I don't have another email address to give you.

They tried again. "Your email address flagged up in our system." It's hilarious because that's just technobabble. "Flagged up" means nothing at all. There's nothing wrong with my email address. I know WAY more about email than they do. So I wrote back "this email address obviously works because we're having a back and forth conversation using it. Please make no changes."

They gave up and used the email I gave them.

Here's the feature in Apple Mail that lets you select your From address. And I have special cased my ID in Postfix so that if I login with MY ID, I can send emails from an address other than my logged in address

Installed #Postfix and configured #DKIM and got #DNS configured and I can send an email from the server to my proton email and it no longer goes to the spam folder, it actually shows up in my inbox and I think cool, got it all set correctly.

But now I notice that it seems like any other address I try to email (not my proton email address) I get a bounce message saying the email address doesn't exist.

Any #email gurus got a suggestion for what I should be looking at?

Test run successfully completed!

I moved from a classic multi-component mail server setup (based on #postfix, #dovecot,…) to #Stalwart mailserver - entirely written in Rust and it runs and performs great so far after half an year :)

Pour savoir comment utiliser des classes de caractères (comme [:space:]) dans des regex de filtrage #Postfix, il faut lire la page de manuel regexp_table(5). Elle renvoie à la page de manuel regex(7). Pour les classes, celle-ci renvoie à wctype(3). Celle-ci nous donne finalement la documentation de cette classe : isspace(3) .

L'informatique, c'est simple !

#IPv6 only trusted mail servers anyone? First sketch of the idea on the #postfix mailing list: https://marc.info/?l=postfix-users&m=172887901607343&w=2

KVM, but Smol | @bsdbcr @Tubsta

Listen now: bsdnow.tv/578

Limiting Process Priority in a #FreeBSD Jail, The web fun fact that domains can end in dots and canonicalization failures, Replacing #postfix with dma + auth, modern unix tool list, #Smol #KVM
Via @bsdnow @Tubsta@soc.feditime.com

Is is just me, or has https://www.postfix.org/ been really really slow for a long time now? A little worried that the home of one of the most popular open source #email servers is slowly dying.

I've been running my own #email servers for over two decades now, with spurts of enthusiasm and improvement. The last project has been to run the various software parts in immutable containers on #Kubernetes, and I'm quite happy with the result. I do see a decline in requests for hosted accounts on personal domains, as friends and family seem to settle with accounts on major providers like Gmail. I'm not going to throw in the towel though. Self hosted for the win!

For the curious, my stack is #Postfix, #Rspamd, #Dovecot and #Roundcube for those who prefer webmail over a native client like #Thunderbird or #K9mail. #Sieve for automatically organizing mail in the proper folders. Used to run #PostfixAdmin, but was unhappy with it, so I wrote my own API in Go to edit accounts, mailboxes and aliases. Never got around to write a frontend, but it was a Swagger interface, so..