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Re: Received: and sending IP

2011-09-02 18:50:00

On 9/2/11 11:18 PM, ned+ietf-smtp(_at_)mrochek(_dot_)com wrote:

-----Original Message-----
From: Frank Ellermann 
Sent: Friday, September 02, 2011 12:50 PM
To: Murray S. Kucherawy
Cc: ietf-smtp(_at_)imc(_dot_)org
Subject: Re: Received: and sending IP

IIRC many servers note the client (sender) IP as comment
only if it does not match any IP of the EHLO name, but I
guess that is not your question.
Yes, it's a comment.  But still others show the name (if any) and the IP (in 
all cases).
The question is really: Why a comment and not an additional preposition clause?
As I understand it, the feeling was that introducing a new formal clause
was likely to break extant parsers for this stuff.

I personally did not and do not agree with this choice, but the consensus
went the other way, and now the installed base is kinda difficult to ignore.

Yep. I have at least two customers which run core business applications in which they use (home-grown) code that parses the Received lines, to determine a date/time timestamp. I'm sure there are many others out there. Changing the format of the Received lines will cause problems here and there, no doubt.


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