Google Outbound Services Configuration Guide - Manual (Page 117)

126 Outbound Services Configuration Guide
Set Up Reinjection
Before you can register your IP addresses in the Administrative Console or set up
a smarthost, you must allow reinjection. For an overview of reinjection concepts,
see “Set Up Reinjection” on page 14.
To set up reinjections, add Outbound Services as a trusted relay in your
sendmail.mc file.
Instead of adding RELAY_DOMAIN commands to your sendmail.mc file, you can
set up a relay domain file. Use this method if you have a need to list relay domains
in a separate file.
If the reinjection servers are not outbound servers, repeat these steps for all
servers along the mail flow between reinjection and the outbound server to allow
the injection server to relay mail traffic through them.
Configure Outbound Services IP ranges to be a trusted relay
1. Add the following to the file /etc/mail/sendmail.mc :
RELAY_DOMAIN('obsmtp.com')
RELAY_DOMAIN('postini.com')
2. Restart the sendmail server process.
Alternate Method: Configure a trusted relay using a separate file
1. Add the following to the /etc/mail/sendmail.mc file.
RELAY_DOMAIN_FILE('/etc/mail/relay-domains')
2. Add the domains
obsmtp.com
postini.com
to the file
/etc/mail/relay-domains
3. Restart the sendmail server process.
Register Your IP in the Administration Console
After you have set up reinjection, register the IP address of your outbound mail
server in the Administration Console. Do not change your smarthost until your IP
address is registered in Outbound Servers.
For instructions on how to register your IP in the Administration Console, see
“Register Your IP in the Administration Console” on page 15.