James Eagan's Mail.app plug-in scans the text of users' e-mail for hints that they might be intending to attach anything to them (it picks up on words that include 'attach') and notifies them in the event that they try to send the e-mail without the attachment.  It's pretty easy to install, too - users download a plug-in mailbundle that's meant to be dropped into users' Mail Folder Bundle directories after Mail's quit.

The plug-in only works with OS 10.4, though, and we don't know how sensitive it is yet (what if the word 'attach' or other words including it aren't used in the text?).  Still, this little program should prove useful all the same - hey, its restrictions notwithstanding, it's better than nothing, right?

Read on for more about the program.