Rated 4 out of 5 stars

great tool to get better and more refined filters but would it be possible to add regex to attachment name?
e.g. I need to only filter mails with attachments O-(\d)+-(TRA|PRF)-\d+\.pdf so they can be automatically printed

This review is for a previous version of the add-on (1.4.1). 

Sure, may be a good idea; attachment support is a little ropy at the moment anyway and needs a number of fixes - can you raise an issue here please?