If example.com and www.example.com share the same system, port 25 will work.
So, the receivers will accept the mail.
My home system is like that. In fact, the mail server is not the web
server, but from the firewall/Internet they seem to be the same!
Guy
-----Original Message-----
From: owner-spf-discuss(_at_)v2(_dot_)listbox(_dot_)com
[mailto:owner-spf-discuss(_at_)v2(_dot_)listbox(_dot_)com] On Behalf Of David
Brodbeck
Sent: Wednesday, September 15, 2004 9:41 AM
To: spf-discuss(_at_)v2(_dot_)listbox(_dot_)com
Subject: Re: [spf-discuss] Wildcard DNS entry
On Tue, 14 Sep 2004 23:16:16 -0400, Meng Weng Wong wrote
spammers will start to forge www.example.com
receivers will observe that www.example.com has no mx record
receivers will try to connect to port 25
receivers will observe that www.example.com is not an mta
this knowledge can be recorded in some sort of rfc-ignorant
type system or reputation ssytem or whatever.
That's basically callback verification, isn't it, other than the central
database?
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