Hi,
I've just added a new domain on the toaster.
I've used vadddomain and everything went ok.
When a user from the new domain receives a mail it's ok but when teh user tryes to send an email he gets the following message:
"Server reports error. The response is: DNS Temporary failure (#4.3.0)"
Thanks and regards.
Did you check whether its a reverse DNS lookup on the connection?
check this "smtpd_lookup_tcpremotehost" in toaster-watcher.conf, you might also be requiring reverse DNS.
Also your rblsmtp could be set to "fail closed" which would be A Bad Thing usually.
From console you might want to check your resolv.conf and hosts.conf, try out dig, etc to make sure DNS is peachy.