From: Harry Hoffman (hhoffmanip-solutions.net)
Date: Wed Feb 06 2008 - 13:22:10 CST

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Sadly, it seems that more and more mail servers are RFC-apathetic :-(

And the admins even more so... It almost seems the larger the company
the less likely to follow RFCs (IME).

There there's people like spamcop who think that RFCs are ok for some
things but not for others :-(

</sigh>

--Harry

Paul Schmehl wrote:
> --On Wednesday, February 06, 2008 12:25:19 -0500 Harry Hoffman
> <hhoffmanip-solutions.net> wrote:
>
>> You just need to take it a step further :-)
>>
>> ...
>> rcpt to: <nosuchuser12323123123123132124432342yahoo.com>
>> 250 recipient <nosuchuser12323123123123132124432342yahoo.com> ok
>> data
>> 354 go ahead
>> Testing
>> .
>>
>> 554 delivery error: dd This user doesn't have a yahoo.com account
>> (nosuchuser12323123123123132124432342yahoo.com) [0] -
>> mta367.mail.mud.yahoo.com
>> 421 Service not available, closing transmission channel.
>> Connection closed by foreign host.
>>
>>
>> Valdis.Kletnieksvt.edu wrote:
>>> On Wed, 06 Feb 2008 10:44:10 CST, Paul Schmehl said:
>>>
>>>> RCPT TO: <abuseyahoo.com>
>>>> 250 recipient <abuseyahoo.com> ok
>>> % telnet f.mx.mail.yahoo.com 25
>>> ...
>>> rcpt to: <ctl-alt-cokebottleyahoo.com>
>>> 250 recipient <ctl-alt-cokebottleyahoo.com> ok
>>>
>>> Yee. Hah. They 250 for a probably-nonexistent account (unless that
>>> one actually *does* exist? :)
>>>
>
> They're also the first mail server I've ever connected to that won't accept
> userdomain.tld and insists on <userdomain.tld> instead. So, I'm not
> surprised to find that they 250 everything you type in.
>
> I guess RFCs are even more meaningless now than they always have been. :-(
>
> BTW, privately I was informed that the *real* address is securityyahoo-inc.com.
>
> Who knew.
>

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