Authenicating users

[Drew Marshall]

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Kevin Miller wrote:
            Surly if your MS boxes are just relays,
            Milter-Ahead should get a 250

 reponse when it tries to send your address a challenge message so I
can't see why it shouldn't work. It would fail if it can't verify the
address (Gets a 550 bounce) or can't route the domain/ host.
    

 My understainding is Exchange 5.5 doesn't do the milter-ahead thing.  To get
a user list out of 5.5, I'd have to export LDAP data, massage it, etc.
There's a FAQ or a MAQ on setting it up, but it entails bones, feathers,
masks and rattles and I've never felt inclined to tackle it.  Exchange 2003
can easily be set up to reply to an address challenge apparently so when
we're on it, milter-ahead should respond appropriately.  Can't wait...
  

Agreed but the point is that if you send a message to a machine that is
running Milter-Ahead, that machine sends back a probe message to check
you (The sender) have a valid return address. It will connect to the MS
box on the edge of the original sender's network. If that box only relays
and doesn't do any form of recipient checking (As you may have in an
Exchange 5.5 set up, if you don't import the users etc) then the probe
will be accepted as being addressed to a valid user. Therefore in the
situation described there should be no reason why Milter-Ahead should
fail (Unless there is something more fundamental wrong with the message
sent in the first place).

Drew

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