Here's the howto:
http://wiki.list.org/x/OAB0But the short version is you want to edit listname.mbox/listname.mbox and then run bin/arch to regenerate the archives. Make sure to shut down mailman for the few minutes while you do this if you don't want to risk missing messages.
Lindsay Haisley wrote:
I've done this before but it's been a while, and I don't remember the answer - so maybe one of you kind folks will give me the answer and save me the research.
When editing a Mailman pipermail archive to expunge one or more posts prior to using the arch utility to regenerate all the archive files, what's the master file that one needs to edit? - the listname.mbox file, the listname.txt file or the listname.txt.gz file?
Is there a HOWTO somewhere on editing pipermail archives?