Try
http://support.microsoft.com/support/kb/articles/q176/4/66.asp
http://support.microsoft.com/support/kb/articles/q155/8/31.asp
David
> -----Original Message-----
> From: RISTO, JONATHAN [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, March 01, 2000 7:32 AM
> To: [EMAIL PROTECTED]
> Subject: MS Exchange ports
>
> We are attempting to allow the Exchange server to communicate through a
> firewall type setup to a second exchange server. This is an internal
> firewall, and we need to allow the two servers to pass mail to the
> different groups.
>
> What I am interested in finding out is the ports which will need to be
> opened on the firewall. Has anyone done this before, and if so, what
> ports does it communicate upon.
>
> Thanks
> Jonathan
>
>
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