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Date: Wed, 06 Feb 2008 12:25:19 -0500
From: Harry Hoffman <hhoffman@...solutions.net>
To: Valdis.Kletnieks@...edu
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: What makes Yahoo! a good merger candidate?

You just need to take it a step further :-)

...
rcpt to: <nosuchuser12323123123123132124432342@...oo.com>
250 recipient <nosuchuser12323123123123132124432342@...oo.com> ok
data
354 go ahead
Testing
.

554 delivery error: dd This user doesn't have a yahoo.com account 
(nosuchuser12323123123123132124432342@...oo.com) [0] - 
mta367.mail.mud.yahoo.com
421 Service not available, closing transmission channel.
Connection closed by foreign host.


Valdis.Kletnieks@...edu wrote:
> On Wed, 06 Feb 2008 10:44:10 CST, Paul Schmehl said:
> 
>> RCPT TO: <abuse@...oo.com>
>> 250 recipient <abuse@...oo.com> ok
> 
> % telnet f.mx.mail.yahoo.com 25
> ...
> rcpt to: <ctl-alt-cokebottle@...oo.com>
> 250 recipient <ctl-alt-cokebottle@...oo.com> ok
> 
> Yee. Hah.  They 250 for a probably-nonexistent account (unless that
> one actually *does* exist? :)
> 
> 
> 
> 
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