ESA policy based routing

[Boris Uskov]

Hello, team.

I have two internet providers in the office. I'm planning to use ESA as MTA for incoming and outgoing Emails. Is it possible to configure ESA, so that some outgoing Emails go from ESA to the destination mail-server over first ISP, some Emails - over the second ISP?

The selection should be made according to some special word in mail header, which will be formed on Excahnge Server.

[Boris Uskov]

Hello, 

We found the soution. Maybe it'll be interesting for someone. 

We can use Outbound Content Filters on ESA. There we can configure the action "Deliver from IP Interface". So that we can configure Outbound Content Filter to send mails of specific users from the specific IP address (for example, from IP address of interface Data 2).

After that we can configure out network equipment (Cisco router in our case) to redirect traffic from specific IP address of ESA (e.g. Data 2) to the second ISP. For that purpose we should configure Policy Based Routing on cisco router.