Mail queue started filling up on one of the Ironports after this alert.
The url_rep_client was restarted due to an error.
Looking at the logs I see this error.
grep “unable to” mail_logs -t
ACCEPT SG None match sbrs[none] SBRS unable to retrieve country unable to retrieve
DNS checked out ok. Found a TAC case that indicated a possible bug. Forced update on reputation engine.
repengupdate force
Confirmed update by tailing the updater log file.
tail updater_logs
Forced mail delivery in the queue.
delivernow
Please choose an option for scheduling immediate delivery.
1. By recipient domain
2. All messages
[1]> 2
No change. Decided to reboot with 30 seconds to wait before forcing connections to close. I was a bit worried about all the stuck messages in the queue. After the reboot queue retained all the original messages and slowly started delivering them.
Sometimes all you need is a good old system reboot.