I just found this rather neat trick in Gmail. I wanted to find emails that have zipped or archived files, such as 7zip or rar.
If you type this ‘filename:(7z OR zip OR Rar)’ into the search bar on your email it will quickly go find all mails with those attachments.
This could be adapted quite easily to find other things as well. Once you have performed the search and if you have turned on the ‘Quick links’ plugin in the labs section, you create a quick link so you never have to type it in again. (don’t forget to give it a sensible name though)

