One quite common problem that administrators might encounter is this:

Scenario: Exchange 2010 environment. The external mails are not being received, and if someone from the organization sends an e-mail to an external receipt it works with no problems.

Cause: Forced reboot / Power down

1. The first step that probably all administrators will do is to check what is happening to those e-mails that are received. Send a test mail from an external e-mail address ( like gmail / yahoo ) to your internal e-mail address, and then go to EMC ( Exchange Management Console ), then click on Toolbox in the right menu, and after that double-click on Message Tracking. A new ie window will appear, and you will be prompted for login. After that go to: search for messages i’ve received from / select user / and enter the address from were you made the test. Then click OK.

The search results will appear, and then double click on the test message for details. If the delivery report looks like this, go to step 2:

Delivery Report for Aurel Proorocu

Failed
6/27/2011 10:03
The message couldn’t be delivered.

2. Go to Start / services.msc / press enter:

3. After the Services window appears, search for Microsoft Exchange Transport, then right-click on it and select restart.

4. Then after the service is restarted repeat the external mail test and it should be ok.

ENJOY.

And if you encounter any problems feel free to comment / contact me.