Strip signatures and replies from emails

Question

I\'m currently working on a system that allows users to reply to notification emails that are sent out (sigh).

I need to strip out the replies and signature

Answer 1

If you can assume that these emails are in plain text, just strip lines that begins with ">" as replies, and "-- " line should delimit signature. But those assumptions might not work, as not all people over internet use software that complies to rules.