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/
