Hi I have a issue with a mailserver configured with sendmail.
In mailq I have many entrys with:
(dnsbl map: lookup (254.0.168.192.list.dsbl.org.): deferred)
The DSBL blackhole list went dead almost five years ago. You should remove it from your configuration.
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.