Hi,

We're using Postfix+OpenLDAP+CourierIMAP, with four virtual domains.
Mail coming in from anywhere is OK, and is directed to the right
mailboxes. Mail being relayed via this server from inside to outside is
not working because of a message in the log that reads like this:

to=<user@outside.addr>, relay=virtual, delay=0, status=bounced (unknown
user: "user@outside.addr")

This suggests to me that Postfix is trying to relay to a virtual host
that it manages, rather using smtp to relay out, having failed to look
up a virtual address.

These are the settings in main.cf that I think are relevant:

mynetworks = 192.168.0.0/24 127.0.0.0/8
local_transport = virtual
smtpd_recipient_restrictions = permit_mynetworks, check_relay_domains

relayhost is not set
relay_recipient_maps is not set
relay_domains is not set
transport_maps is not set

Any is gratefully received.

Phil.