Postfix: Relay access denied whenever sending e-mail
 

Hi, today my e-mail server stopped sending outbound e-mail. I am using Postfix for the sending side and Dovecot for receiving Whenever I try to create a new message in Evolution and send it, it says "RPCT TO <e-mail address> failed: Relay access denied". This only happens if I use Evolution to send e-mail. If I use the SquirrelMail webmail program I have on my web site, everything works fine. What's wrong?

I'd guess your mynetworks setting in main.cf, but a bit hard to tel lfrom what you've said. Squirrelmail will be running on the server, so it's accepting from localhost, but I would assume that you're using Evolution over a network.