full-disclosure - Strange Emails -- What are they?

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Message-ID: <4486F57E.1070207@snosoft.com>
Date: Wed Jun  7 16:49:29 2006
From: simon at snosoft.com (Simon Smith)
Subject: Strange Emails -- What are they?

ok, that makes sense... will greylisting counter this?

Geo. wrote:
>> Alright,
>>     If this is spam/email harvesting then please explain how it is
>> working without any legitimate return path? I understand blasting out
>> bunk emails with a legit return path, but these emails have no such
>> path. Whats the ditty?
>>     
>
> When you try and send email to a non-existant address, the receiving server
> rejects during the smtp transaction so a return address is not needed since
> the sending bot gets this error message before the transaction is completed.
>
> Geo.
>
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