[Alpine-info] bouncing emails changes From and Date headers

[Jeff Bastian]

On Sun, 11 Apr 2010, James Pittman wrote:

> Could it be your ISP forcing an SMTP server on one of you? I think I've

> heard of this in the past, whereby any connection on the SMTP port is

> redirected to the ISP's server, regardless of what address you specify.



Interesting idea, but no, we're both using SMTP with SUBMIT (smtp auth on 
port 587, see RFC 2476) over TLS.  From .pinerc
    # List of SMTP servers for sending mail. If blank: Unix Pine uses sendmail.
    smtp-server=smtp.gmail.com/submit/tls/user=my_name_here at gmail.com

This means (1) using port 587 instead of port 25, (2) authenticating to 
the SMTP server with name and password, and (3) TLS certificates verifying 
the identify of the SMTP server and encrypting the traffic.

I would be very concerned if my ISP is doing a man-in-the-middle attack 
on that. :)

Jeff