I couldnt find anything that could help me sort GMail messages according to size, so that I can delete files with large attachments (no, I dont want to install Outlook, Thunderbird and others).
So I went ahead and built me a small Python script. You need to have the IMAPClient library installed. Then download and run this Python script to find big GMail messages.
experimenta o http://www.findbigmail.com/
já usei e nunca tive problemas.