I recently added email to my mastodon instance, and with that success, I'm ready to finally cut email ties with Google. I bought a new domain name and I'll set that up with postfix/dovecot/etc, then start moving all of my various internet accounts over to it.
The new domain has a .net TLD instead of the current .com TLD, and that's nice; it's more appropriate since I'm not running a business. Now I'm just waiting for the DNS changes to propagate.
Well, after a lot of swearing… I *think* I have a Raspberry Pi 400 running #AlpineLinux … tethered to my 4G phone hotspot … acting as a crude WiFi router/bridge for my border router running #OpenBSD which is tunnelling to my OpenBSD VPS at Binary Lane.
Over that tunnel, I now have #Postfix on the home mail server, relaying over the VPN to #OpenSMTPD on the VPS.
Should be useful the day I have to leave Internode… but for now, it's bypassing the rather dead NBN service (thank-you #CycloneAlfred).
@icedquinn @tk yeah, I know people who did setup #postfix for a living for decades...
Random name check to all the devs that for free give me so much creative software:
#linux
#LibreOffice
#gimp
#inkscape
#wordpress
#postfix
#Dovecote
#nginx
#NextCloud
Thanks so much... nuff said really x
Probably missed loads, sorry!
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?
@DigA_UniLeipzig alles ist besser als #MicrosoftExchange: Selbst nen alter #UltraSPARC-T2 mit #Solaris sowie #Postfix & #Courierist besser, weils nativ mit allen Clients.wie @thunderbird funktioniert.
There's an awful lot of "change these two settings and things Just Work™" and not a lot of "You need to make sure that these settings exist".
Apparently part of the "not signing emails" is because I'm using SASL auth, so it comes from an "external" server (my local machine). But it's locked down. But Amavis sees it as external. And all the blogs and tutorials and docs either do nothing or go "yeah, just change this setting (that's not in your config)" 
About #XMPP and #Email services:
@wpn `woodpeckersnest.space/eu` is running #Prosody with #biboumi #IRC gateway to XMPP and #Postfix #Dovecot #Spamassassin #Roundcube for email, on #Debian Stable.
Services list and status: https://health.woodpeckersnest.space/
#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
OH SHIT EMAIL DELIVERY! That's right, two of my apps deliver their own outgoing email. I gotta migrate very old #postfix! This is gonna hurt, right?
It turns out that once you've gone through the effort of setting up a #Postfix mail server, it's Really Easy™ to add #DKIM signing to it with #opendkim.
It's also Really Necessary™ because if your server ever needs to email someone on a Gmail or Yahoo managed domain, the message may not get through if it isn't DKIM-signed. (Ask me how I know.)
#sysadmin #mailServer #SMTP
Anybody have a link to a resource that talks about setting up DNS entries to authenticate a VPS Postfix server for sending registration emails that are authenticated properly? I feel like I'm just going in circles and everything I'm finding is like use the settings provided by your email service. But that's not what I'm trying to do.
I have #Postfix configured on the server for sending local email only and can send an email using `mail`. Can't seem to figure out the correct settings to put into the smtp settings in #Mattermost to get it to connect to postfix.
Email spam delivery is off the charts for the last week. I have no idea whats driving it, but the numbers for RBL blocks, SASL login spam, and scam mail are at an all time high.
Attempted distraction campaign during Trump trial? Cyber warfare ramping up as retaliation for war funding (or not)? Hard to say, all I know is there is some push happening right now.
# telnet mx2.ipoac.nl 25 -4
Trying 86.80.166.233...
telnet: Unable to connect to remote host: Network is unreachable
# telnet mx2.ipoac.nl 25 -6
Trying 2a02:a46f:95b7::1...
Connected to mx2.ipoac.nl.
220 mx2.ipoac.nl ESMTP Postfix
Just amazing that my cable #isp #ziggo blocks tcp dport 25 outbound over #ipv4, but #ipv6 is fine apparently.
Still not very useful with a fixed reverse #DNS that ends in cable.dynamic.v6.ziggo.nl that #spamfilters seem to love.
How to configure AWS SES with Postfix MTA on #Debian #Linux 11/12
https://www.cyberciti.biz/faq/howto-configure-aws-ses-with-postfix-mta-on-debian-linux/
This is something work demands. At a personal level, you don't need this. #opensource #postfix #sysadmin
That was fast: @echopapa pointed me at https://blog.schaal-24.de/mail/mails-mit-postfix-fuer-einzelne-domains-nur-ueber-ipv4-oderipv6-verschicken/ which seems to be the perfect answer. I took that post and translated it to english in this gist: https://codeberg.org/jwildeboer/gists/src/branch/main/20240410PostfixIPv4IPv6.md Will test later today to see if it works as advertised.
I use multiple RBLs on my private mail server, one of which was https://www.spamhaus.org/ (specifically the "zen" blocklist), but they suddenly became way too aggressive and started blocking a bunch of legitimate email, so they are out now.
Are you missing a bunch of email in the last few days and are you using Spamhaus? Might want to check your logs.
