Receive connector setting in Exchange 2007 to receive VM from my 3com PBX

Since changing over to Exchange 2007, I am unable to set the proper configuration to allow us to receive emails from our PBX.  The only setting on the PBX are the actual IP of the PBX and the smtp domain name.  I now need to allow it to send emails via the receive connector in Exch 2007.  I have set the permission group to Anonymus and with Authentication with TLS ONLY.  Anybody know of the proper settings for this connector?  I've tried many many combos with no luck.
jlagasseAsked:
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NpatangCommented:
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jlagasseAuthor Commented:
I have already tried this site.
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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
If this is all internal it sounds like you want to setup the PBX to allow to relay, follow the link below and it will walk you though the setup:  

Allowing application servers to relay off Exchange Server 2007
http://msexchangeteam.com/archive/2006/12/28/432013.aspx


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jlagasseAuthor Commented:
we added the ip address of the pbx to allow relaying and it worked.
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