Google Outbound Services Configuration Guide - Manual (Page 118)

Sendmail 127
Increase Server Timeouts
Changing server timeouts should not be necessary. In Sendmail, server timeout is
set in the value
Timeout.datafinal . By default it is set to 1 hour. If
Timeout.datafinal has been changed to a lower value, raise the value to 1 hour.
Set Up Smarthost
Set the smarthost in your sendmail.mc file.
WARNING: Do not change this value until you have set up the appropriate
RELAY_DOMAIN setting and registered your IP in the Administration Console. If
your IP is not registered in the Administration Console, Outbound Services will not
deliver your mail.
Configure a smarthost to route traffic to Outbound Services
1. Add the following line to the /etc/mail/sendmail.mc file:
define('SMART_HOST',outbounds[your system number].obsmtp.com)
where [your system number] is your system number. To find what system to
use, see “Identify Your System” on page 13.
2. Stop and restart the sendmail server process.
Test Outbound Mail
Once you have set up your smarthost, test that your configuration is correct and
mail is flowing normally.
Test the configuration.
1. 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.
2. Test inbound mail to confirm normal functionality. Send a message from an
outside email address to an address on your service.
3. In the Administration Console, select your email config organization and click
the Outbound Servers tab. After a minute of successful mail flow, traffic
should display on the graph.