Multipal internal servers port forwarding

[akashif]

Dear Friends,

I have followings pfsense structure

1. WAN
2. OPT1
3. LAN

I have following internal servers

1. Web Server 1 –> 192.168.3.150 --> server1.MY_domain.com
2. Web Server 2 --> 192.168.3.151 --> server2.MY_domain.com
3. Exchange server --> 192.168.3.153 --> exchange.MY_domain.com (https)

Now I need to do following tasks
Forward port 80 such as

If someone accesses “server1.MY_domain.com” request should go to server1
If someone accesses “server2.MY_domain.com” request should go to server2
If someone accesses “https:// server3.MY_domain.com” request should go to server3

Is it possible to filter inbound traffic (on WAN interface only) on bases of user’s typed domain?

In addition to this I need to forward all mail traffic to server3 (exchange server) that is
I want to set WAN1 as MX1 of my domain and OPT1 as MX2 of my domain.
what ports should i forward?

Please advise
Thanks