(NEW SSL SECURE METHOD)
Server: smtp.gmail.com
Authentication: Yes
Port for TLS/STARTTLS: 587
or
Port for SSL: 465
(IF YOUR DEVICE DOES NOT SUPPORT SSL)
To connect with SSL, you need to provide a Google username and password for authentication. Ensure that the username you use has cleared the CAPTCHA word verification test that appears when the user first logs in.
Server: aspmx.l.google.com
Authentication: Yes
Port: 25
SSL or Encryption: NO or OFF
Source: Sending mail from a printer, scanner or app http://support.google.com/a/bin/answer.py?hl=en&answer=176600
(ALTERNATIVE SMTP SERVER SOLUTIONS)
Use: http://www.hmailserver.com/
Doc: http://www.ceics.com/support/google-mail-smtp-relay-solution