Solved

Unable to receive email on Exchange server after changing ISP's.

Posted on 2013-01-13
2
520 Views
Last Modified: 2013-01-13
Hi,

I'm helping a company moving their network/server from one location to another.  They have also switched ISP's.  With the new ISP, they received a new static IP.  They have a Windows SBS with Exchange configured and are behind a Sonicwall firewall.  I have updated the firewall with the new static IP address info.  All computers have access to the internet and can send email but they are not receiving email.  I have contacted the hosting company and they have confirmed the MX record is correct, the same as the new WAN IP from the new ISP.  In midst of this change over, the hosting company had changed the port from I believe it was 587, not positive to 443.  I'm certain this is SSL.  Anyways, I changed the Sonicwall firewall rules to allow any WAN request to go to the internal server's IP addres.  Still not receiving email.  Am I missing something?

Thanks

Ted
0
Comment
Question by:TeddyZ83
[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
2 Comments
 
LVL 58

Accepted Solution

by:
Cliff Galiher earned 500 total points
ID: 38772840
External email is always port 25 unless you were/are using a smarthost.

So use something like MXToolbox to make sure the MX record ACTUALLY got updated and propagated. And to test to make sure port 25 is not blocked by your ISP.
0
 

Author Comment

by:TeddyZ83
ID: 38772857
I had the host change the port number.  It was set to 443 but this was going to the internal web page.  They changed it to 587 and email is receiving now.
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

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
If you troubleshoot Outlook for clients, you may want to know a bit more about the OST file before doing your next job. IMAP can cause a lot of drama if removed in the accounts without backing up.
The video tutorial explains the basics of the Exchange server Database Availability groups. The components of this video include: 1. Automatic Failover 2. Failover Clustering 3. Active Manager
The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…
Suggested Courses

623 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