Our shop is an educational shop and left mailman many years ago for Sympa because of features in Sympa not in mailman. Currently Sympa is showing its age, and is relying on perl modules that have been EOL's and the Sympa community has not discussed (within in ear-shot of me at least) what to do about it.
We found that we are not using the extra features Sympa provides anymore and with MM3 already dockerized it seems that MM3 is a much better fit for our organization for the foreseeable future.
So I got a dockerized setup up and running in a test environment and am pleased with the results except for now I have to start thinking about migration from Sympa to MM3.
The API is useful in this effort as there are python wrappers already done and I didn't have any trouble scripting list creation with the API tools to migrate list owners, moderators and users.
Now for the question/hard part. Migrating list archives.
In Sympa the list archive is just a maildir format directory structure reflecting month/year. In MM3 the Archive is stored in the db with attributes that are likely only available as the message is processed.
I'd really rather not loose the archive data if I can help it. Does anyone have any thoughts on how I could perhaps import this?