Re: [Exim] caching HELO/EHLO data

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Author: Nigel Metheringham
Date:  
To: exim-users
Subject: Re: [Exim] caching HELO/EHLO data
On Wed, 2004-03-03 at 11:04, Ollie Cook wrote:
> However, it seems that some legitimate sites change their HELO/EHLO argument
> quite frequently, despite the connecting IP address being constant.


Interesting... but see below

> I take this to imply that it's reasonable to expect that hosts should only
> identify themselves with one constant string. Do others concur, or know of any
> other place where the consistency of HELO/EHLO arguments is discussed?


Nope.

However think of hosts behind some form of NAT - either a NAT gateway
(DSL users maybe, or some corporate arrangements) or a load balancing
setup - which smells like your ebay examples.

At least when you think SMTP mail handling is getting complex, you can
at least be thankful that we ain't doing all this under X400.

    Nigel.


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[ Nigel Metheringham           Nigel.Metheringham@??? ]
[ - Comments in this message are my own and not ITO opinion/policy - ]