cross-posted from: https://lemmy.sdf.org/post/46161145
I’ve been using Thunderbird to sort out my junk email for a while, ever since I walked away from my Gmail account. Thunderbird does a great job, but it does mean it has to stay running somewhere.
However I’m currently in the process of moving and as a result I’ve had to shut down the system that that I had been running Thunderbird on. The result of which, obviously, is that my inbox is now being flooded with spam.
Since it’s been a while since I last looked at the problem, I figured I ask. How do you deal with spam email?
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Well… Been using Proton since 2020 and ever since that I don’t have spam issues. I am also using aliases, so if somebody sends me way too many newsletters I just disable the alias. This probably won’t help you, but you asked 😀
As @eksb@programming.dev said, SpamAssasin and diligent training. Also, pFsense will filter based on rules and criteria in conjunction with Suricata or Snort.
I recently looked at my emails spam filters and my goodness. I’ve built a monstrosity over a few decades here.
LMAO! I would speculate that conservatively 90% of all my mail is spam that gets either rejected or dropped in the trash bin.
Hard SPF and DKIM enforcement helps.
I use POPFile, open source software that classifies email into whatever categories you set up using a Bayesian algorithm (so you train it). It works as a proxy so it does it when your download email, so not a solution to your inbox filling up unless your can figure out how to run it on the server automatically.
It tags the email with a header and I use Thunderbird filters to move mail to folders for spam, adverts, political spam, and regular inbox.
It’s abandonware but it still works and doesn’t really need any more features IMO.
My mailserver runs on Stalwart. Whatever it does works for me. I haven’t yet had to change the defaults. It’s also very easy to set up and requires next to no maintenance.
(It also does JMAP, which is like IMAP, but modern and efficient)
Unfortunately JMAP isn’t supported (yet) by a lot of email clients. I don’t think there’s a good open-source email suite for computers available… But I’ve tried Stalwart as well and it’s really sleek and seems to come with good defaults.
Sure, not widely supported, but if you use clients supporting it, it is great. Blazingly fast, while IMAP is always slow.
Also, Thunderbird is working on JMAP support: https://blog.thunderbird.net/2025/09/state-of-the-thunder-mozilla-connect-updates/
spamassassin
There are some tweaks you can usually do on the server/host side as well. That’s particularly helpful if you use Thunderbird on multiple devices, such as desktop and phone.
Hopefully it will be even easier over time to sync settings between devices — I’d love to see filters and signatures across devices one day.
