[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

May be forged tag in the email header

Posted on 2004-11-15
10
Medium Priority
?
2,315 Views
Last Modified: 2012-06-21
I have an Exchange 2003 server behind a firewall. The untrust side of my firewall resolves to mail.mydomainname.com when a reverse DNS lookup is performed.  When Sending email and looking in to the headers, some receiving email servers place a (May be forged) note to the Received from line.

My server tags the outbound emails as myservername.mydomainname.com which is different from the resolution of the sending IP address mail.mydomainname.com
Received: from Myservername.mydomainname.COM (mail.mydomainname.com [xxx.xxx.xxx.65] (may be forged))

Questions:

What happens if I change the name of and Exchange 2003 server?  Will it keep working normally? or is ist a big risk to do that.  My rational behind that is that if I change the name to mail then the LAN and WAN tags in my outbound emails will match and hopefully resolve my "may be forged" problem)  some sites reject my emails and some let them through with the mentioned tag line

What can I do to resolve the issue with out changing the name of my server?


ThanX
0
Comment
Question by:stylmark
  • 3
  • 2
  • 2
  • +1
8 Comments
 
LVL 104

Expert Comment

by:Sembee
ID: 12595834
You cannot change the name of a running Exchange server. You would have to migrate the data to a new machine, rebuild and then reinstall Exchange so that new databases are created.

It may just be an issue of what your Exchange server announces to the world - and that can be easily fixed:

1. ESM, Admin Groups, <your admin group>, Servers, <your server>, Protocols, SMTP.
2. Right click on the Default Virtual SMTP Server and choose Properties.
3. Click on the tab "Delivery" then "Advanced".
4. Where it has "Fully Qualified Domain Name" enter the name "mail.domain.com" (minus quotes, using your actual name).

Simon.
0
 

Author Comment

by:stylmark
ID: 12596131
Simon,

If I do what you suggest, what impact would that  have on email delivery with in my LAN.  Right now all my Outlook clients point to "myservername.mycompany.com" for their exchnage accounts.  If I change the name of my virtual SMTP server to mail.mycompanyname.com  woul I have to change the entry in my Outlook clients for their exchange account?

ThanX
0
 
LVL 104

Expert Comment

by:Sembee
ID: 12597321
It will have absolutely no impact on anything within your domain. Remember that the Outlook clients are using the AD to lookup the Exchange server - so this name has nothing to do with it.

Simon.
0
Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

 
LVL 3

Expert Comment

by:OnsiteComputerMedics
ID: 12597425
Just to be safe you could keep a CNAME record in DNS that will poing "myservername.mycompany.com" to "mail.mycompanyname.com"
0
 
LVL 3

Expert Comment

by:OnsiteComputerMedics
ID: 12597431
Just to be safe you could add a CNAME record in DNS that will point "myservername.mycompany.com" to "mail.mycompanyname.com"

I should read what I write before I hit submit
0
 

Author Comment

by:stylmark
ID: 12843139
I answered my own question. It is OK to close this question
0
 
LVL 20

Expert Comment

by:Venabili
ID: 12893287
Please post the solution. Otherwise I will have to recommend either award of points to someone or delete - NO refund

Venabili
0
 

Accepted Solution

by:
stylmark earned 0 total points
ID: 13335911
What I did to resolve the issue was to have my domain host  (We have a third party company hosting our domain) make an entry to resolve mail.mycompany.com to xxx.xxx.xxx.65  where  xxx.xxx.xxx.65 is the un trusted side of my firewall, then I just crated a policy to allowed traffic through my firewall to reach my exchange server.

The problem also was that my mx record and my mail.mycompany.com pointed to another company that sends/receives/scans/cleans my mail of viruses and spam, so when I was sending email the recipient server would see that it came from my server at that .65 address and it would compare to the reverse lookup and they were 2 different addresses so it thought it was forged.

Hope this helps someone.
0

Featured Post

NEW Veeam Agent for Microsoft Windows

Backup and recover physical and cloud-based servers and workstations, as well as endpoint devices that belong to remote users. Avoid downtime and data loss quickly and easily for Windows-based physical or public cloud-based workloads!

Question has a verified solution.

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

Are you using email marketing software? If not, you're missing out on effortless marketing and the reaching of desired conversion rates through email marketing software.
Here in this article, you will get a step by step guidance on how to restore an Exchange database to a recovery database. Get a brief on Recovery Database and how it can be used to restore Exchange database in this section!
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
In this Experts Exchange video Micro Tutorial, I'm going to show how small business owners who use Google Apps can save money by setting up what is called a catch-all email address in their Gmail accounts. By using the catch-all feature, small busin…

834 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