On Wed, Jan 15, 2003 at 09:14:18AM -0800, Dave Crocker wrote:
Folks,
The 'alternate' port used for doing SMTP over SSL is 465. This appears
to be a well-established, de facto standard.
Well, yes and no.. It used to be established before STARTTLS
command was specified, and like with IMAPS-port is being superceded
with IMAP protocol's STARTTLS extension, same fits also SMTP.
I don't remember the source, but I have written into ZMailer's smtp
server subsystem configuration manual:
PARAM listen-ssmtp
Listen on port TCP/465, which is deprecated
SSL/SMTP listener port.
PARAM outlook-tls-bug
Microsoft does it again... If TLS is set at Out-
look, and server port is not 25, it bloody well
seems to expect that the server starts in TLS hand-
shake mode.
This implements a 2 second startup delay in case
the port is some other than 25, and if some byte is
received from client during that time, and it hap-
pens to be 0x80, then this server will initiate TLS
negotiation. If nothing happens (well-behaving
client), normal SMTP greeting is presented.
...
Thoughts?
d/
--
Dave Crocker <mailto:dhc(_at_)dcrocker(_dot_)net>
Tribalwise <http://www.tribalwise.com>
--
/Matti Aarnio <mea(_at_)nic(_dot_)funet(_dot_)fi>