David M. Douglass wrote:
Port 587 and TLS for Gmail have been tested and verified via Microsoft Outlook testing.
I recognize that lame Microsoft terminology is a source of confusion here. "TLS" setting in Microsoft (and some half-brained followers) has little to do with TLS. It is just RFC 2487 (http://www.faqs.org/rfcs/rfc2487.html) negotiation.
With stunnel you could enable RFC 2487 negotiation with: protocol = smtp
Mike