I often send empty e-mails with just some attachments. Since some e-mail clients don't show the presence of attachments very clearly, I prefer to indicate that the e-mail contains attachments.
In French I just write "cf pj", which means "see attachment". What's the shortest abbreviation in English for "see attachment", "see enclosed file" or anything equivalent in an e-mail? The best I have found so far is "see att".