On Thu, Jun 18, 2009 at 06:57:39AM +0100, Steve wrote:

> I've just realised that I don't understand something clearly. I have
> this top header in a mail;
> 
> Received: from instantinfo.com (unknown [74.10.219.114])
> Received: from ipnet5-host235.subictel.com (unknown [210.14.36.235])
> 
> and even some like this;
> Received: from MKISHQCX ([118.76.7.122])

The *content* inside parentheses "(" ")" is not standardized by any
RFC, and is MTA dependent. Postfix records a particular set of data,
other MTAs do other things (including lie).

-- 
        Viktor.

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