Re:5 seconds won't be enough (Score 1)

I configure postfix to queue all mail, and only send it with "sendmail -q". I run a script that checks the queue, and once all mail in the queue has been there for at least 5 minutes, it sends it along. Of course, I can do it by hand, too.

I end up cancelling an email about once a day, which allows me to go add that missing attachment, fix the CC list, etc. etc.