Why do I need to put two backslashes before the '+' in the first regexp, but only one before the '.' in the second? send-hook '~t ^lang\\+moo' 'my_hdr From: Mr Bean <lang@ms\.chinmin\.edu\.tw>' I have a mailing list set up at a box in my email address and I want to change my From: line for emails to that email+box address. The above send-hook works. I am just interested in the reason why only one backslash didn't work. -- Greg Matheson Make a mistake Chinmin College, Taiwan Try it, you'll like it [EMAIL PROTECTED]