GMail now offers sending from an external SMTP server. I have Verizon FIOS and would like to send email using outgoing.verizon.net (so that the email appears from another non-gmail account without the "on behalf of..." header information). However, when trying to configure the GMail settings, I get the following message:
Authentication failed. Please check your username/password.
[Server response: Remote server does not support TLS code(500) ]
I am using the correct username/password. Is it possible to use outgoing.verizon.net with GMail?