mail stuck in postfix

I have been having problems with receiving duplicate mail in my inbox. Sometimes the same mail would arrive that was already delivered an hour ago. Tonight it got so bad that I received 4 to 6 copies of the same mail. After reading some man pages and doing a bit of investigation, I discovered that the 'active' queue of postfix had around 400 mail messages stuck in it. It kept on delivering them, but never deleted them. So I deleted them manually with postsuper. After that things returned to normal Does anybody know what could cause this? Thanks -- Andre Truter Software Engineer Registered Linux user #185282 ICQ #40935899 AIM: trusoftzaf http://www.trusoft.za.net ~ A dinosaur is a salamander designed to Mil Spec ~