For mailing lists with lots of posts it is convenient to have the posts sorted in folders according to date, e.g.
201602 for the posts arriving at february in 2016. To do this with a rule requires a change of the destination folder
in the rule each month. Furthermore one has to create a new folder each month too.
It would be nice to have a rule that could do all this by itself. This requires the usage of some sort of variables in rules
as the folder is not constant.
If only part of the current date should be used a syntax like a format string for strftime could be used.

Comments