On 06-Aug-98 at 15:49:13 Philip Hazel wrote:
> On Thu, 6 Aug 1998, John Horne wrote:
>
>> argus.plymouth.ac.uk => 141.163.2.1
>> 141.163.2.1 => argus.plym.ac.uk
>
> Yes, but argus.plym.ac.uk => 141.163.2.1
>
> so checking IP => name => same IP would succeed. However, if somebody
> has set up, say,
>
> sender_host_accept = argus.plymouth.ac.uk
>
> then doing the check by reverse lookup won't work.
>
That is true, and the very reason I mentioned it. (I got a message from
Swansea this morning regarding a news feed, and they were having problems with
our forward/reverse lookups for this reason). We tell the users to use the
long-form, but the DNS people don't seem to want to follow suit. I have
configured exim to use the long-form 'plymouth.ac.uk' address because that is
what we are supposed to be using. One day we'll have one domain name...
John.
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John Horne E-mail: J.Horne@???
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University of Plymouth, UK Fax : +44 (0) 1752 - 233919
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