[SpamCop-List] Re: X-Originating-IP source

[N. Miller]

On Sun, 19 Feb 2006 06:26:43 -0800, Mike Easter wrote:

> N. Miller wrote:

>> On Fri, 17 Feb 2006 20:11:43 -0800, Mike Easter wrote:

>>> I've also seen that server handle
>>> spams which had an additional XOIP for a total of 2 of them.  I
>>> wonder how SC would deal with that?

>> Like this?

> http://www.spamcop.net/sc?id=z878969073z39b892174846cf5b8640240ec7ec9f55z

>> Except that there are _three_ XOIP lines!

> That's an excellent example of several things.
> 
> Most importantly it is an example of a recent hotmail with an XOIP which
> isn't in the Received tracelines, which I was looking for.  Steve Baker
> also provided one of those over in nanae.
> 
> In this case, we have different 'parties' adding XOIP lines and SC
> actually picking one out and using it and picking the correct one.

Actually, I did know that it wasn't quite what you were discussing. I don't
have a mailhost which substitutes an "XOIP" line for a "Received" line, so
I can't really test that with the SC parser.

You did miss where the second "XOIP" stamp came from. SBC Yahoo! DSL
Service (they now actually call themselves, "AT&T Yahoo! HSI", but the
server names probably will not be changed) is a strange hybrid. Prodigy.net
servers are still the MX servers for the nine SBC domains (of which one is
"pacbell.net"). So email to pacbell.net goes through a prodigy.net MX
server, which stamps the "XOIP" for the incoming connection. After that,
the email is handed off to a yahoo.com MDA, which also stamps an "XOIP"
line. While it _is_ redundant, I believe it is an artifact of the AT&T
Yahoo! agreement. I believe that legacy AT&T customers, who are not using
the Yahoo! SMTP/POP3 servers, will get one "XOIP" line from the prodigy.net
MX servers. I believe that Yahoo! Mail customers, without the ISP servers
feeding the yahoo.com MX/MDA system, will get one "XOIP" header line.

Oh, and I just threw it in because you mentioned a "two "XOIP" line" email
message.

-- 
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum