I like to have incoming mail on a particular subject available to me on my home system (running Mercury) and on my work PC - I work for a large company and have no opportunity to change anything at that end.
So mail on that subject is sent to a distinctive address which is aliased to a General Rule. The work system doesn't seem to like attachments bigger than 3Mb so I filter them out and just send a notification that there's a big mail which has not been forwarded. The RUL file is:
Always Copy "Chris"
If size > 2999999 SendMessage "[work].com:c:\\mercury\\toobig.txt"
If size < 3000000 Forward "[work].com"
This works, but it would be nice to know what was in the big mail. I'd like to strip the attachment off the mail and forward just the text, rather than sending a notification, but I can't see how to do that.