Hello There ,

Our organisation has 2 different entities at different locations.Both place we have Exchnage 2010 setup for emails as different exchange organisations.Is it possible to transport emails each other through a VPN connectivity ? We wanted to reduce the delay the email transfers.

Much apreciate any support

Regards,

Ratheesh

In entity A you can create a send connector with B's address space that points to B's Exchange servers as the smart hosts.  This will cause mail for domain B to go to B's Exchange servers rather than using MX records for routing.

Hi Ratheesh,

Thank you for your question.

Is the different domains on 2 entities?

I agree with Ed. However, we didnt suggest message flow go thought VPN because it will occur the bandwidth on VPN, and it will affect other service in organization.

If there are different domains, we could create accept domain by the following link:

https://technet.microsoft.com/en-us/library/jj945194(v=exchg.150).aspx

If there are any questions regarding this issue, please be free to let me know. 

Best Regard,

Jim

Hi Jim and Ed ,

Thanks for your valuable advice.

I will be restricting the VPN traffic only to the traffic between Exchange srvr A to B. Which is on 100 Mbps line (We have 4 * 100 Mbps lines connectivity for Internet).Maximum email expected to send/Receive per day will be less than 200. We are not allowing any attachment more than 10 MB.This way i believe there wont be any performance issue with the bandwidth.

Regards,
Ratheesh

Please feel free to mark my response as the answer and/or helpful as appropriate.

Hi Ed ,

I have created send connector at Site A pointing to Site B with server B address with Cost 1.Site B configured with site A address. Email traffic is happening in seconds. But the problem am going through now is that emails are delivered to Junk folder until we move it to inbox manually from recipient's mailbox at least ones. Should I need to create a receive connector for Site A at Site B server and vice versa or any other settings am missing.

Request your guidance.

Regards,
Ratheesh

Try this:

Create a new receive connector that has the RemoteIpRanges property set to the IP addresses of the other organization's Exchange servers that send the mail.  Then you can configure permissions to bypass antispam checking.  Substitute your own connector's name.

Get-ReceiveConnector "New Connector" | Add-ADPermission -User "NT Authority\Anonymous Logon" -AccessRights ExtendedRight -ExtendedRights ms-exch-bypass-anti-spam

Note that I haven't done this myself, it's the result of research, so I'm not sure it works as advertised.