I am running postfix 2.3.3 as part of Centos 5.5.
I am trying to set up a hybrid mail system which involves postfix,
dovecot and Google Apps.
Ideally - I would like the email clients to use a authenticated TLS
connection to postifix (which is working fine) and then postfix to relay
the mail through smtp.google.com also through a authenticated TLS
connection using the same credentials as the "Client-Postfix"
connection. AFAIK smtp.google.com requires an authenticated TLS connection.
The motivations for doing this is to ensure that all mail gets saved in
the google apps sent mail folder. I would prefer the clients to connect
to postfix rather than direct to smtp.google.com to improve client
apparent sending speed for large emails.
All suggestions welcome.
Thanks.
Richard.
