Mail not getting to your exchange server?

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When this happens you need to get onto the issue ASAP. Users will not be happy if they cannot send or receive emails and then they realise that they cannot see their calendar and they can’t remember who their next meeting is with.

Now let’s get into some of the common problems with exchange recieving emails

Internet is down

If the internet is down then mail cannot get from the internet to your server.

To check this just test internet connectivity and if it is down get it back up.

Port Forward Issues

For exchange to work properly you need to have the SMTP port forwarded to the server. This in most cases will be port 25 which is the default SMTP port.

You can check that this is configured by logging into your router/firewall and checking the port forwarding settings.

You can also test by logging into the server using telnet to port 25 from an external location. If you can log in you will know that the port forwarding is working correctly.
If telnet does not work but your router/firewall has the port forwarding configured there is a networking problem that you will need to track down.

DNS issues

If your MX records are pointing to the wrong IP address emails will not go to the right place.
MX records are the domain name records which specify a mail server responsible for accepting email messages on behalf of a recipient’s domain.

There is a good online tool that I use for checking MX records called MXToolbox where you can put in the domain name of the email you are trying to reach and it will give you the DNS information about the domain’s MX record.

Problem on the exchange server

Usually most problems on Exchange servers can be fixed by restarting the exchange services. Honestly I’m not sure why but it just works 99% of the time.
You will also want to check the following the recieve connectors and the mailbox databases to make sure they are configured correctly.
You can also check the Event Viewer for any exchange relared events. Usually the important ones will show up in the administative events view.

Author

Jake Gardner

Jake is an IT Consultant/Systems Engineer that works for a business that offers services to SMB clients. He runs his own business that delivers solutions geared towards online marketing and web design.

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1 Comment

  1. Istimsak Abdulbasir June 13, 2014 at 11:27 am

    You make trouble shooting an exchange server an easy task. Are their fixes for viruses, cracks or incorrect configuration files?

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