Exim Bouncing messages

[AngelofDeth]

Hello,

Our Exim has recently (I think) started bouncing mesaages to unknown users instead of rejecting them. This is causing us to be blacklisted at a certain site. Looking at exim.conf, it looks like it is set to be rejecting unknown users. ANyone have any suggestions at why it might not be rejecting? Heres the part of exim.conf that I think controls this... :

require verify = sender
accept domains = +local_domains
endpass

#recipient verifications are required for all messages that are not sent to t
#this was done at multiple users requests

message = "The recipient cannot be verified. Please check all recipients of
verify = recipient

accept domains = +relay_domains

 

[chirpy]

Exim shouldn't bounce emails with its standard configuration to anyone other than the connected relay. Check the default aliases (* in /etc/valiases/* and unless they're forwarded make sure they're set to :fail:

It would also help to check /var/log/exim_mainlog (on linux) for the transaction of a bounced message to see where it is happening which might help narrow down the issue.