Google Outbound Services Configuration Guide - Manual (Page 26)

28 Outbound Services Configuration Guide
9. Click OK again. You should see your IP address listed as an External DNS.
10. Click OK twice to return to the System Manager.
11. In System Manager, restart your mail server.
Test Outbound Mail
Once you have set up Private Outbound DNS, test that your configuration is
correct and mail is flowing normally.
Test the configuration.
1. Go to the Queues tab in Internet Mail Service Properties. Items with a retry
state could indicate outbound mail delays.
2. Send a message from a mail client inside your network to an outside address.
You should see a line in the header email which indicates being received and
delivered by
exprodNobM.obsmtp.com , where N and M are numbers.
System IP Address to use for Private Outbound DNS
5 64.18.4.12
6 64.18.5.12
7 64.18.6.12
8 64.18.7.12
9 74.125.148.12
10 74.125.244.12
20 64.18.9.14
200 207.126.147.11
201 207.126.154.11