Solved

Outboud messages sit in Queue with the following error 451 4.4.0 primary target IP address responded with "421.4.4.2 unable to connect."

Posted on 2008-10-22
4
1,599 Views
Last Modified: 2013-11-30
I have just installed Exch2007 and am having problems with sending mail.

Messages just sit in the queue with the follwoing error message:

451 4.4.0 primary target IP address responded with "421.4.4.2 unable to connect."attempted failover to alternate host, but that did not succeed.Either there are no alternate hosts, or delivery failed to all alternate hosts.

Any ideas what is wrong or what I shoudl be checking?

Incoming mail is fine.

Exchange 2007 SP1
Server 2008 x64
0
Comment
Question by:grahamsmyth
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 5

Expert Comment

by:marques_salazar
ID: 22781889
Are you getting event id 2019?
0
 
LVL 2

Author Comment

by:grahamsmyth
ID: 22784306
I don't see that event coming through.

I have attached a copy of the event log.
System-Events.txt
0
 
LVL 2

Accepted Solution

by:
grahamsmyth earned 0 total points
ID: 22800183
Managed to figure it our - Transport Service would not start due to IPv6 being disabled!!!
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Pop culture is prime bait for hackers seeking to infect user’s computers and mobile devices with malicious malware. Hackers know exactly what the latest trends are online and know how to use them to their advantage.
This article will help to fix the below errors for MS Exchange Server 2013 I. Certificate error "name on the security certificate is invalid or does not match the name of the site" II. Out of Office not working III. Make Internal URLs and Externa…
In this video we show how to create a Contact in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Recipients >> Contact ta…
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…
Suggested Courses

615 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question