Mail bounces with retry errors

[edvanleeuwen]

I have problems sending mail to a forward address on my domain covs.nl to some domains, e.g. ziggo.nl, zonnet.nl. Other domains are just fine. When I send an e-mail to the e-mail address on the domains directly, it succeeds. But when I send it via the forward if fails.

The errors returned are one of the below:

retry time not reached for any host after a long failure period
retry timeout exceeded

I have checked the DNS settings and the only problem I see is that only one DNS server seems to respond.
I have tried to temporarily stop csf and lfd, but without success.
I have checked RBLs, but the domain is not on any list.
I have removed the files in /var/spool/exim/db and restarted exim.

Nothing seems to be working.

Could anyone help me with this?

 

[nobaloney]

Those aren't the real errors. Thos are simply the reasons you're getting the email back. You need to check your /var/log/exim/mainlog file to see what errors are eing returned by the recipient server.

Jeff

 

[edvanleeuwen]

Thanks for your reply. I set the log_selctor to all and noticed that some outbound connections to valid mailservers were blocked. When I checked the csf.deny the mailservers IP's were in there due to port scans on port 25. I removed them and set the threshold of PT-SCAN from 5 to 10. Hope this helps.