On the gentoo system, the ssmtp package is delivered as the base mailing system. This document will show you how to configure the ssmtp mail system for use with Google Mail.

[email protected]
mailhub=smtp.gmail.com:587
rewriteDomain=
[email protected]
FromLineOverride=YES
UseSTARTTLS=YES
[email protected]
AuthPass=******

# sSMTP aliases
# 
# Format:       local_account:outgoing_address:mailhub
#
# Example: root:[email protected]:mailhub.your.domain[:port]
# where [:port] is an optional port number that defaults to 25.
root:[email protected]:smtp.gmail.com:587
alogin:[email protected]:smtp.gmail.com:587