Solved

Cannot send to external addresse, but can receive external & send & receive internal

Posted on 2008-06-15
9
221 Views
Last Modified: 2010-03-06
We replaced our primary DC running Server 2003 and the following error popped up on our existing Exchange Server 2003.  

Users can send and receive to any internal address.  They can also RECEIVE mail from external addresses.  However,  no one to SEND e-mail to EXTERNAL addresses.  Any suggestions.

Everything has been working fine for 2+ years until we replaced our Primary DC.  Thanks.
0
Comment
Question by:rjwcpa
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 4
9 Comments
 
LVL 23

Expert Comment

by:debuggerau
ID: 21790111
was the old primary DC also your cached DNS server for exchange?

Or was the DNS forwarder in exchange, using the DC for resolution?

0
 

Author Comment

by:rjwcpa
ID: 21790121
Yes the old DC was the only DNS server.  I removed and reinstalled the DNS service on the DC because I could not connect to the internet, but after the reinstall and adding forwarders DNS is working.
0
 

Author Comment

by:rjwcpa
ID: 21790124
I have not changed any settings on my Exchange Server prior to and after the replacement of the DC.
0
Comparison of Amazon Drive, Google Drive, OneDrive

What is Best for Backup: Amazon Drive, Google Drive or MS OneDrive? In this free whitepaper we look at their performance, pricing, and platform availability to help you decide which cloud drive is right for your situation. Download and read the results of our testing for free!

 
LVL 23

Expert Comment

by:debuggerau
ID: 21790284
have you tried to nslookup an address from the exchange server?
If it cant see the outside 'DNS' world, it will never resolve to send.

So maybe your new DNS server is a root server itself and not forwarding properly?
Is the firewall blocking port 53?
0
 

Author Comment

by:rjwcpa
ID: 21790317
The firewall configuration has not changed, and it worked fine before the introduction of the new DC.

I can connect to webpages on the EXchange server and can telnet to my ISP local mail server to send test e-mail.  However, I cannot telnet to any other mail server.
0
 
LVL 23

Accepted Solution

by:
debuggerau earned 500 total points
ID: 21790365
Good, so your testing the SMTP by telneting to port 25 on various servers...
This should tell you that unless you connect and get a HELO response, chances are it wont connect.
So just check the windows firewall firstly, are you using the DC for DNS lookups?
Are you trying to connect with domain name or IP address?

0
 

Author Comment

by:rjwcpa
ID: 21790400
Yes I am using the DC as the DNS.  And I am using domain names.  The only domain name I can connect to on port 25 is mail.alltel.net (MY ISP mail server).
0
 
LVL 23

Expert Comment

by:debuggerau
ID: 21790530
And what about telnet to the ip address of a known email server?
0

Featured Post

[Webinar] Learn How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

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

This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
In-place Upgrading Dirsync to Azure AD Connect
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

726 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