A few recent local changes included a restructuring of inbound mail delivery to include UCE (more frequently called spam) filtering using a combination of the venerable procmail and the increasingly impressive bogofilter.
It should have been simple, but then the problems started…
A recent upgrade to python 2.6 left a getmail cron job spewing warnings about a deprecated import of the sets module:
DeprecationWarning: the sets module is deprecated
Since python 2.4 the functionality of this module has been duplicated by built-in functions; a quick conversion is all that is required to quieten the new warnings. The patch is available here for those with a similar problem:
getmail-4.8.4-python-2.6.patch
No problems with it here so far, please leave a comment if you use the patch and find any.