'Mail From:' SMTP command not working with google smtp server
<p>I'm trying to send an email using smtp-relay.gmail.com as a relay server, but when I try to use the 'Mail From:' command, I get this error:</p>
<blockquote>
<p>c:    mail from: username@google.com</p>
<p>s:    555 5.5.2 Syntax error. f23sm825435wmf.2 - gsmtp</p>
</blockquote>