NOTE: I had tried posting this yesterday, but the message never got posted. I 
checked the logs, and it showed that it was received, passed spam filtering, 
and then... nothing. What followed was several hours of debugging with the help 
of Claude Opus 4.8. I finally tracked down the root cause, but had no idea why 
it started failing now: I hadn't changed anything since the list upgrade back 
in January. While I was messing around I decided to also fix the broken 
footers, so those should be working.

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 
= = = = = = = = 

I thought I'd share a little bit of what goes on to host this list (and the 
Dabo lists).

I use rspamd (https://www.rspamd.com/) as my spam filter. I have the list 
software configured to run everything through it before it begins processing 
any email; those that are flagged as spam are written to a file and otherwise 
ignored.

Once a day I have a script running on a cron job that analyzes that file, and 
sends me a single email summary of the previous day's suspected spam for 
review. It's rare to find legitimate mail that was incorrectly marked as spam, 
but it does happen. 

The script extracts the subjects, senders, and recipients, and sorts them by 
count, and then alphabetically. It also contains a link I can click to delete 
the file if there's nothing good in it.

This morning's summary was larger than usual. Typically there are a couple 
hundred held spam messages a day, but yesterday the total was 933! That's a lot 
of spam!

I was going to include the email summary in this post, but with all those 
spammy subjects, it wouldn't make it through any of your spam filters, so I 
posted it on my website, with some internal details redacted.

https://leafe.com/docs/listspam.html


-- Ed Leafe


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