relay by gmail

I have followed the Virtual Users And Domains With Postfix, Courier And MySQL. I don't have reverse dns, so i want to relay all my e-mail with gmail. How to enable STARTTLS in postfix??
Does gmail allow relaying ? How do u plan to do this ? I think the howto enables STARTTLS by default.

Via SMTP.
Yes it does.

Okay in that case postfix does support postfix as a client authentication.
Add this to your config

smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/gmail_passwd
smtp_sasl_type = cyrus
relayhost = [smtp.gmail.com]:587

Create the file /etc/postfix/gmail_passwd
[smtp.gmail.com]:587 username@gmail.com:password

Then
postmap /etc/postfix/gmail_passwd
postfix restart

It works!

( hrgy84 | 2008. 02. 07., cs – 05:07 )

But the SMTP server of GMail replaces sender address to the GMail user's address. You need fetch the mails from GMail POP3 server if you want receive a replies.