I am trying to use Sendgrid as SMTP server for sending all emails from my users using Google Apps for email.
The catch is that Sendgrid requires password authentication and i couldn't find a way in Google apps Admin console to out that in (theough of coruse, there are ways to enter the SMTP server IP, but it doesn't work).
Thanks a lot for your help! AJ
The sendgrid API auth's from within the request. Simply use UrlFetch to send POST requests containing your API creds to the sendgrid endpoint.