Solved

HUB transport role in DAG

Posted on 2011-09-05
4
979 Views
Last Modified: 2012-05-12
I have two Exchange servers. One of them has CAS, HUB, MB roles. Another one has HUB, MB roles. These servers are in DAG.

Before current config there there was only one HUB server and messages were sending normally.

After I installed HUB server on second server messages can be send only through old HUB server and when they are sending through new one they hangs in queue with error:

Delivery Type DnsConnectorDelivery

451 4.4.0 Primary target IP address responded with: "421 4.2.1 Unable to connect." Attempted failover to alternate host, but that did not suceed. Either there are no alternate hosts, or delivery failed to all alternate hosts.

Incoming messages passes normally.

Send connectors are similar for both HUB servers.

What can cause such a problem?
0
Comment
Question by:roma_vt
  • 2
  • 2
4 Comments
 
LVL 33

Accepted Solution

by:
Busbar earned 250 total points
ID: 36483279
did you allow the second server to resolve DNS and connect over port 25 to external hosts
0
 

Author Comment

by:roma_vt
ID: 36483290
=))))) Yes, I'm idiot! This is so obvious and I forgot to open port 25! Thanks a lot busbar!
0
 

Author Closing Comment

by:roma_vt
ID: 36483291
this full solution
0
 
LVL 33

Expert Comment

by:Busbar
ID: 36483296
you welcome ;)
0

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

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

Lotus Notes – formerly IBM Notes – is an email client application, while IBM Domino (earlier Lotus Domino) is an email server. The client possesses a set of features that are even more advanced as compared to that of Outlook. Likewise, IBM Domino is…
Read this checklist to learn more about the 15 things you should never include in an email signature.
In this video we show how to create a Shared Mailbox 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 >> Sha…
To show how to create a transport rule 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 Mail Flow >> Rules tab.:  To cr…

839 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