troubleshooting Question

Incoming mail stuck in delivery queue

Avatar of Alexandre Takacs
Alexandre TakacsFlag for Switzerland asked on
ExchangeEmail Servers
13 Comments1 Solution99 ViewsLast Modified:
All the sudden (not quite, did some "housekeeping" work over the WE, including replacing expired certs - most probably broke something in so doing) I have one of ur exchge server 2013 (latest CU) no delivering messages to mailboxes

The messages are adopted from remote servers but stuck in the SMTP delivery queue (yes it is a french UI)
queue
The error message reported is:

11.04.2020 21:32:02 - Remote Server at maildb01 (192.168.168.2) returned '441 4.4.1 Error encountered while communicating with primary target IP address: "Failed to connect. Winsock error code: 10061, Win32 error code: 10061." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts. The last endpoint attempted was 192.168.168.2:475'

Note non-standard port 475 being used - I guess that's my issue but not quite sure where to check / modify this option
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 1 Answer and 13 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 13 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros