Internal Routing in Exchange 2010

Hi All,

We have Eskar Fax server installed in Internal network and configured MX record in Internal DNS server to point Eskar Fax server.

> set type=mx
> fax.domain.com
Server: njpfgdc01.domain.com
Address: 10.4.164.167fax.domain.com MX preference = 10, mail exchanger = wcesker.fax.domain.com
wcesker.fax.domain.com internet address = 10.1.8.33

Also we have configured ForeignConnector,

RunspaceId             : 07fb4487-7dee-47e0-b40c-78d015c1b8d2
DropDirectory          : Esker Connector (RICWCCAS1)
DropDirectoryQuota     : unlimited
RelayDsnRequired       : False
Enabled                : True
AddressSpaces          : {ESKERFAX:*;1, Faxgate:*;1, FAX:*;1}
ConnectedDomains       : {}
IsScopedConnector      : False
IsSmtpConnector        : False
Comment                :
SourceRoutingGroup     : Exchange Routing Group (DWBGZMFD01QNBJR)
SourceTransportServers : {RICWCCAS1}
HomeMTA                : Microsoft MTA
HomeMtaServerId        : RICWCCAS1
MaxMessageSize         : unlimited
AdminDisplayName       :
ExchangeVersion        : 0.1 (8.0.535.0)
Name                   : Esker Connector (RICWCCAS1)

Now the problem is, when user sending any email using faxnumber (i.e 12345678@fax.domain.com) it was delivering to FOPE and we are getting NDR report saying that "Unknown domain".

Is there any way that we can configure any connector that will resolve and deliver to Fax server.

Please help me.

Regards

Ganga Enterprise Messaging Administrator-Exchange 2010. Windows 2008 Active Directory Configuring.