I upgraded from Debian 5 to Debian 6, and in doing so went from Postfix 2.5.5 to 2.7.1. I'm using MySQL as a backend for virtual domains/mailboxes.
After the upgrade, I'm able to receive mail from outside sources, but when I try to relay outbound mail, I'm getting 554 Relay access denied. Here's what I think are the relevant configuration parameters in my main.cf:
mydestination = relayhost = # using virtuals mynetworks = all smtpd_recipient_restrictions = reject_invalid_hostname, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, #reject_unauth_destination, check_relay_domains, reject_non_fqdn_recipient, permit smtpd_sender_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_non_fqdn_sender, reject_unknown_sender_domain, reject_unauth_pipelining, permit
Can someone please help me to understand what might have changed in the upgrade that would cause this to break?