----- Original Message -----
From: "John Warren" <John(_at_)wenet(_dot_)tustin(_dot_)ca(_dot_)us>
To: <spf-discuss(_at_)v2(_dot_)listbox(_dot_)com>
Sent: Wednesday, January 28, 2004 9:09 AM
Subject: Re: [spf-discuss] SPF advocacy
Even if the ISP blocks 25, there's always 465. ;)
That's port 587 :)
Port 465 was used for SMTPS, which is regular SMTP, entirely wrapped in in
TLS jacket. According to the IETF, as far as I know, using SMTPS is no
longer part of the acceptable standard. The current way of doing things, is
using the protocol extension STARTTLS, from within SMTP running in normal
mode, which only activates TLS inside the SMTP protocol.
In sendmail, you can offer STARTTLS (or disable it: "S") in the
DaemonPortOptions; and, since it is started with regular SMTP, it can be
enabled for port 25 too.
If you're going to find something on 465, then it will likely not be
standard SMTP, but an "stunnel" -ed listening port. On 587 you will probably
find regular SMTP, but set with the 'a' flag, to require SMTP AUTH.
- Mark
System Administrator Asarian-host.org
---
"If you were supposed to understand it,
we wouldn't call it code." - FedEx
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