[stillSpirit]

Kevin,

At the end of the current version of the postfix log is the following error,

Aug 2 13:18:04 tpqbumail postfix/trivial-rewrite[484]: warning: do not list domain xxxx.xx.xx in BOTH mydestination and virtual_mailbox_domains
Aug 2 13:18:04 tpqbumail postfix/smtpd[4348]: NOQUEUE: reject: RCPT from localhost.localdomain[127.0.0.1]: 550 : Recipient address rejected: yyyyy; from= to= proto=ESMTP helo=
Aug 2 13:18:04 tpqbumail postfix/smtpd[4348]: disconnect from localhost.localdomain[127.0.0.1]
Aug 2 13:20:01 tpqbumail zimbramon[4696]: 4696:info: 2006-08-02 13:20:01, QUEUE: 0 0


The bit about "in BOTH mydestination and virtual_mailbox_domains"

could that be my problem?

Seems we don't have any issue sending to the relay server via port 25.