Solved

Internal email servers weird routing

Posted on 2016-09-27
4
27 Views
Last Modified: 2016-09-29
below i have a message header from an email sent from one user to another in our organization. Both users reside on the same server but in different mailboxes.

Looking at the log it looks like it was passed around servers a few times before coming to rest at the correct mailstore. what could cause this sort of routing issue? Everything else seems to be working without issue.

Received: from INTERNAL-EXCHSRV.internaldomain.local (192.168.1.12) by
 INTERNAL-MAILSRV.internaldomain.local (192.168.1.33) with Microsoft SMTP
 Server (TLS) id 15.1.466.34 via Mailbox Transport; Mon, 26 Sep 2016 11:29:52
 +0100
Received: from INTERNAL-MAILSRV.internaldomain.local (192.168.1.33) by
 INTERNAL-EXCHSRV.internaldomain.local (192.168.1.12) with Microsoft SMTP
 Server (TLS) id 15.0.1210.3; Mon, 26 Sep 2016 11:29:52 +0100
Received: from INTERNAL-MAILSRV.internaldomain.local ([::1]) by
 INTERNAL-MAILSRV.internaldomain.local ([::1]) with mapi id 15.01.0466.034; Mon,
 26 Sep 2016 11:29:52 +0100
0
Comment
Question by:CaptainGiblets
  • 2
4 Comments
 
LVL 38

Expert Comment

by:Adam Brown
ID: 41818170
Do all your exchange servers have all the roles installed? What version are you running?
0
 
LVL 6

Author Comment

by:CaptainGiblets
ID: 41818198
oen is 2013 latest CU and the other is 2016 latest CU

Basically i am in middle of migrating users between 2013 to 2016 when i noticed this weird issue. but both users are on the 2016 server.

Both have all roles installed.
0
 
LVL 49

Accepted Solution

by:
Akhater earned 500 total points
ID: 41818592
There is nothing weird here, an email is routed to another transport server for it to be in covered by the shadow redundancy in case the sending server failed (part of the Exchange safety net)

in short 2016 got the message from the mailbox server
2016 routed the email directly to 2013 to put it in the shadow redundancy
2013 routed it back to 2016 since the mailbox is on 2016
2016 delivered the message
0
 
LVL 6

Author Closing Comment

by:CaptainGiblets
ID: 41821478
Thanks.
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

ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
This article explains in simple steps how to renew expiring Exchange Server Internal Transport Certificate.
In this video we show how to create a Distribution Group 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 >>…
This video discusses moving either the default database or any database to a new volume.

743 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

11 Experts available now in Live!

Get 1:1 Help Now