I have a similar question. Is there a way to adjust the length of time Zimbra re-tried sending an e-mail before it bounces?
For instance, a user sent an e-mail to gmail.co (an obvious typo) which took almost a week to bounce.
The bounce error was:
I suspect part of the problem is that we use OpenDNS, and OpenDNS returns A records for any DNS lookup.
"<email@example.com>: Host or domain name not found. Name service error for
name=gmail.co type=MX: Host not found, try again"
In any case, how would I go about adjusting the retry limits? I'm thinking I want it no longer than 24 hours.