Re: [exim] Bogus HELOs

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Autor: Marc Haber
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A: 'Exim Users List'
Assumpte: Re: [exim] Bogus HELOs
On Fri, 20 May 2005 10:58:38 +0100, "Mark Smith" <exim-users@???>
wrote:
>Are there any *valid* reasons for a mailserver's HELO greeting not matching
>the hostname obtained from rDNS?


That depends on what you think as "valid". It needs some serious
tweaking to have exim issue the correct HELO if the machine has more
than one IP address, and it is _very_ hard to correctly HELO when exim
is behind a NATting router whose outside interface might have changing
IP addresses.

I suspect that there is mail server software out there that doesn't
allow tweaking the HELO name at all.

Greetings
Marc

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