Yes, you can relay all your mail to Google Gmail from your home system, if you have a Gmail account. Plus, you can get it delivered, fetched, locally.
Postfix has to be configured with TLS and SASL. The following listing will probably make sense, if you're familiar with Postfix. If you've never used Postfix, then, you might want to read the complete tutorial ``Google Gmail on Home Linux Box using Postfix and Fetchmail''
/etc/postfix/main.cf
transport_maps = hash:/etc/postfix/transport
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_generic_maps = hash:/etc/postfix/generic
/etc/postfix/transport
# Contents of /etc/postfix/transport
#
# This sends mail to Gmail
gmail.com smtp:[smtp.gmail.com]
#
# Except mail going to the tape and closet server
tape.squeezel.com relay:[tape.squeezel.com]
closet.squeezel.com relay:[closet.squeezel.com]
/etc/postfix/generic
# Note hostname is squeezel.squeezel.com
chirico@squeezel.squeezel.com mchirico@gmail.com
/etc/postfix/sasl_passwd
# Contents of sasl_passwd
#
[smtp.gmail.com] mchirico@gmail.com:pa33w0r8
Fetchmail
I would strongly recommend using Fetchmail with the ``sslcertck'' option, after you verify and copy the certificates. See the tutorial for a complete step by step approach on how to do this.
#
#
# Sample /home/chirico/.fetchmailrc file for Gmail
#
# Check mail every 90 seconds
set daemon 90
set syslog
set postmaster chirico
#set bouncemail
#
# Google Gmail is mchirico but on computer it is chirico
# To keep mail on the server use the you would put keep at the end.
# user 'mchirico@gmail.com' with pass "pa33w0r8" is 'chirico' here options ssl sslcertck sslcertpath '/home/chirico/certs/.certs' keep
#
poll pop.gmail.com with proto POP3 and options no dns
user 'mchirico@gmail.com' with pass "pa33w0r8" is 'chirico' here options ssl sslcertck sslcertpath '/home/chirico/certs/.certs'
smtphost localhost
# You would use this to by-pass Postfix
# mda '/usr/bin/procmail -d %T'
Regards,
Mike Chirico