On 2010-02-11 Dhiraj Chatpar wrote:
> I got this email in my gmail inbox. i was wondering how it reached there..
> can anyone tell me. There is no MTA defined.

Both Received headers disagree with you:

> Received: by 10.220.45.205 with SMTP id g13cs9092vcf;
>         Wed, 10 Feb 2010 03:26:10 -0800 (PST)
[...]
> Received: from mr.google.com ([10.141.106.5])
>         by 10.141.106.5 with SMTP id i5mr58323rvm.152.1265801170088
>         (num_hops = 1); Wed, 10 Feb 2010 03:26:10 -0800 (PST)

The receiving MTA that added the topmost header just didn't bother
logging the sending MTA as well.

As for how it got there: In-Reply-To and References headers suggest that
the mail was sent from one GMail account to another. Which would also
explain why there are only private IP addresses involved.

> In-Reply-To: <[email protected]>
> References: <[email protected]>
>        <[email protected]>
>        <[email protected]>
>        <[email protected]>

Regards
Ansgar Wiechers
-- 
"Abstractions save us time working, but they don't save us time learning."
--Joel Spolsky

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