Solved

Exchange 2010 Hub Transport Issues

Posted on 2011-03-09
5
4,659 Views
Last Modified: 2012-11-26
I have two virtual Exhange 2010 SP1 Boxes (1 Mailbox and one Client access and Hub Transport server)

The Hub Transport seems to have some difficulty sending to only some email addresses failing with the following error:

"451 4.4.0 Primary Target IP address responded With: "421 4.2.1 Unable to Connect." Attempted to failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts."

Other errors are:
"451 4.4.0 Primary Target IP address responded With: "421 4.4.2 Connection dropped due to SocketError." Attempted to failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts."


Other emails seem to hit the queue and are sent by the time i can hit refresh.

any Ideasa on what going on?
0
Comment
Question by:speeDemon
  • 3
5 Comments
 
LVL 74

Expert Comment

by:Glen Knight
Comment Utility
This is mail going out of your network yes?

Under Server Configuration right click on the server and select properties, under External DNS lookups, add your ISP DNS servers in here.

Then under Organisation Configuration > Hub Transport, check the properties of your internet send connector under Network check the box to use External DNS lookup settings.

Restart the Microsoft Exchange Transport service
0
 
LVL 1

Author Comment

by:speeDemon
Comment Utility
UI already had the check box for "Use External DNS" set so I added the IP I have for a known good DNS server and restarted the transport service and still no luck still getting the above error in the queue.

Here is what the logs are saying::

<,220 *******************,
>,EHLO my.mail.server,
<,250-a2s29.a2hosting.com Hello my.mail.server [<my RDNS IP],
<,250-SIZE 52428800,
<,250-PIPELINING,
<,250-AUTH PLAIN LOGIN,
<,250-XXXXXXXA,
<,250 XXXB,
*,27189,sending message
>,MAIL FROM:<sender@my.mail.server> SIZE=165387,
>,RCPT TO:<Rcpt@their.mail.server.org>,
<,250 OK,
<,250 Accepted,
>,DATA,
<,"354 Enter message, ending with ""."" on a line by itself",
<,421 magnus.websitewelcome.com SMTP incoming data timeout - closing connection.,
>,QUIT,
-,,Remote

Open in new window


*Note: names have been changed for security
0
 
LVL 1

Accepted Solution

by:
speeDemon earned 0 total points
Comment Utility
issue was with our Cisco ASA 5510 Firewall and ESMTP Packet Inspection... Once corrected, i was able to send email without issue
0
 
LVL 1

Author Closing Comment

by:speeDemon
Comment Utility
My Own troubleshooting after members stopped posting suggestions
0
 

Expert Comment

by:captbackfire
Comment Utility
What did you do to correct the issue with the ASA5510?
0

Featured Post

What Should I Do With This Threat Intelligence?

Are you wondering if you actually need threat intelligence? The answer is yes. We explain the basics for creating useful threat intelligence.

Join & Write a Comment

Resolve DNS query failed errors for Exchange
Find out how to use Active Directory data for email signature management in Microsoft Exchange and Office 365.
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 discusses moving either the default database or any database to a new volume.

728 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

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now