I read the other 4 replies to your original message.  It sounds like you
are asking if the Exchange server (rather it be Exchange, Outlook97, 98,
2000, or another Exchange MAPI client) can connect to the Qmail server.

If you are using Exchange MAPI protocols.  No.

Exchange works by a client making a direct connection to the Exchange
server.  Where every click, drag-n-drop, and open is directly on the
server.

Now, if you want to get rid of MAPI (Calender, Address books, Tasks lists,
Scheduler, Notes and more), then you can switch to Qmail.  You would
configure your clients to use 'Internet Mail' instead of Exchange Server
Extensions.  This will remove their 'sharability' for the above features.  

I don't think the president of a company that is used to using Lotus Notes,
Exchange, or Novell clients to switch to a 'non-sharing a schedules'
platform such as 'pop3/smtp'.

And you are correct, Exchange does not use SMTP to talk to other servers. 
It uses X.400 pad's format, which Qmail has no idea how to handle.

Now, you could keep the Exchange servers up and running in the back end. 
Then configure the mail to first route to the Qmail server.  Where the
Qmail server will forward/re-route the mail to the correct Exchange box. 
This will free up the load on the Exchange servers.


Regards,
Eric Duncan

Ps, why does your NT Server need rebooting?  My Exchange servers have been
up for 102 days (last upgrade of the service packs).  They have 512megs of
ram with an avarage of 100 to 150megs free on a network of 4,000 employees
world wide.  Seems stable enough for me and I wouldn't switch to Qmail from
Exchange (the president would kill me).  Even though I love Qmail for
email, pop3/smtp just does not have the resources and features of an
Exchange network.  Humm, maybe someone should write one for the Internet. 
And a RFC to go with it.  So programs such as Pine, Mutt and others can
share calenders and such.  On a Unix platform, that would be smoking!


President.and.CEO
The.Public.Network
http://www.thepublic.net
[EMAIL PROTECTED]





Olivier M. writes:

> I have a friend which has an Microsoft Exchange Mail server ("main" server)
> always connected to the internet, and there are a few (about 10)
> other MS-Exchange servers which are connecting directely to the main 
> mailserver every hour using ISDN-dialin (ppp).
> 
> Now, we'd like to replace the NT server with a linux/qmail server, which
> will most probably need fewer reboots. Problem : the other client servers
> will still use Exchange : will the communication between the systemes
> work fine ? 
> 
> I guess that an Exchange server don't simply use STMP to communicate
> with another exchange server. What kind of protocol is it, and is it
> possible to emulate it using qmail tools ? I looked on the qmail
> homepage and in some other places, and didn't found much details
> about that : maybe you know a little bit more ? I'm just looking
> for some more docs (url...) and why not qmail/exchange configuration
> examples.
> 
> Thanks in advance,
> Olivier, with soon one more unix server :)
> 
> PS: btw, when will the O'Reilly Qmail book be for sale ? :)

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