Google Message Security for Google Apps Administration Guide - Manual (Page 289)

Chapter 15
Test Tools & Mail Flow Troubleshooting 289
Test Tools & Mail Flow Troubleshooting
Chapter 15
About Test Tools & Mail Flow Troubleshooting
From time to time, you’ll need to ensure that the message service is running as
desired. The System Tests section of the Administration Console includes several
programs for testing and troubleshooting the delivery of email.
If you have a mail delivery emergency (no incoming mail), see “Troubleshoot
Incoming Email Delivery” on page 292.
MX Record Test
Typically, you will test your MX records shortly after signing up with the message
service. You might also run the test any time you change MX records or domain
names.
To run the MX Record Test:
1. Go to Orgs and Users > Orgs and select the organization containing the
domain you wish to check. By default, this is your Users organization.
2. Click the System Tests icon and click the MX Record Test link.
3. Choose the domain you want to check.
4. Click Test. The results appear on the bottom of the page.