Re: [Exim] sender_verify

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Szerző: Matthew Byng-Maddick
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Címzett: exim list
Tárgy: Re: [Exim] sender_verify
On Thu, Jul 18, 2002 at 01:56:37PM +0200, Ralf G. R. Bergs wrote:
> On Thu, 18 Jul 2002 16:19:33 +0530, maillist wrote:
> >mail as there is no A record for exim.org.
> I don't know who told you so, but this is nonsense.
> It checks for a valid MX record, of course. Anything else would be nonsense as
> well.


Unfortunately, you appear to be wrong too. The correct thing to do is:

Check for an MX record
|
+-yes-> From the lowest cost MX, look up the A record. If it resolves
  |       try connecting to the answers it gives. A temporary error allows
  |       you to try the next in the chain, a permanent means you should
  |       top there and then.

  |
  +-no--> try connecting to the IP addresses of the A record until you
          either deliver or get a permanent failure, as above.


As to why the original poster is seeing that it's not correctly verifying
domains, I don't know, though they may want to check that their routers
are correct, as exim uses the routers to determine how to verify the
callback.

MBM

--
Matthew Byng-Maddick         <mbm@???>           http://colondot.net/