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Multiple Exchange 2003 Servers Unable to Send Mail to Each Other

Posted on 2007-08-08
Medium Priority
Last Modified: 2013-11-30
In my setup there are 3 exchange servers, 1 for disaster recovery, 1 for journaling, and 1 for production.

My production server works fine. I can send in and out externally as well as internally (within the same mailbox).

The problem stems from my other 2 exchange servers not being able to receive mail internally. They can send internally to my Production exchange server; but when I attempt to reply it just stacks up in Queues "Message Queued for Deferred Delivery".

I have attempted to run "Exchange Best Practices Analyzer Tool" and it can only run on my production server. I am running it with administrator access on the other 2 servers but it says that it "can't connect to the exchange server".
Question by:slimslo

Author Comment

ID: 19654918
Another weird thing, the disaster recovery and the journaling server can send mail to each other; but both can't receive from the production server.
LVL 23

Expert Comment

ID: 19655046
I think you need to create and configure SMTP connectors between your other 2 servers.

Author Comment

ID: 19655365
i'm not completely sure exactly how to do that. lets say i have 1 server on (production), another on (journal), and (disaster recovery). Is there a way to walk me through this?

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LVL 104

Expert Comment

ID: 19655680
SMTP Connectors are not required. They are for outbound to servers outside of Exchange only. They play no part in the delivery of email between the servers.

Are the servers on the same LAN? Are they in the same routing group?
Ensure that AV software is not getting in the way. As you are trying to deliver to a local IP address they can cause problems. McAfee and Symantec I have seen do that.

Can you telnet to port 25 of each of the other servers from all of the servers?


Author Comment

ID: 19656762
Yes I can telnet from the other servers on port 25. Maybe this will clear it up.

1 = Production
2 = Journal
3 = Disaster Recovery

Server 1 Cannot Send to 2, or 3. It is the main exchange server.
Server 1 Can Receive From All

2 Can Send to 1 and 3.
2 Can Receive from 3; but not 1.

3 Can Send to 1 and 2.
3 Can receive from 2; but not 1.

The servers are on the same Lan. they are in the same OU.

These 2 servers were added recently so I was unsure if any special setting needed to be in place.

When I create a new user; i can create them on a new mail store on another exchange server. I can access the mail from outlook web access, that works fine.

I cannot send mail (or foward) from a user on one mailstore to a user onto another mailstore; which I need to do with Journaling.

This problem is only with server 1 sending to server 2 and 3. No special rules are set; there is no firewall between the 3 servers.


Author Comment

ID: 19657332
I was able to recover an error message

Event Type:      Error
Event Source:      MSExchangeTransport
Event Category:      SMTP Protocol
Event ID:      7010
Date:            8/8/2007
Time:            2:22:15 PM
User:            N/A
Computer:      ExchangeServer2
This is an SMTP protocol log for virtual server ID 1, connection #1. The client at "" sent a "helo" command, and the SMTP server responded with "501 5.5.4 Invalid Address  ". The full command sent was "helo user dummy".  This will probably cause the connection to fail.

Author Comment

ID: 19657580
Nevermind; I know what that is. I had telnetted into the server a while ago and punched in a bogus command.

Author Comment

ID: 19658438
so it turns out; someone on their side decided to enable outbound smarthost without telling us. problem solved. thanks for all your help!

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Computer101 earned 0 total points
ID: 20237605
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