static (inside,outside) 70.167.x.x 192.168.1.200 netmask 255.255.255.255
wan                    lan

Configure access-list to allow incoming Wan traffic :

access-list outside_in extended permit tcp any host 70.167.x.x eq smtp

Assign access-list to Outside Interface :

access-group outside_in in interface outside

eg :

static (MPLS,PublicIP) tcp 85.234.75.65 7870 172.18.192.24 7870 netmask 255.255.255.255
!
access-list MPLS_access_in extended permit tcp host 172.18.192.24 host 85.234.75.65 eq 7870
!
access-list PublicIP_access_in extended permit tcp host 172.18.192.24 host 85.234.75.65 eq 7870
!
!
access-group  MPLS_access_in in interface outside
access-group PublicIP_access_in in interface outside

Allow all traffic from source ip to destination ip address:

access-list PublicIP_access_in extended permit ip host 172.18.192.24 host 125.215.194.223
access-list PublicIP_access_in extended permit ip host 172.18.192.24 host 125.215.194.252
access-list PublicIP_access_in extended permit ip host 172.18.192.24 host 125.215.194.253
access-list PublicIP_access_in extended permit ip host 172.18.192.24 host 125.215.194.232
!
access-list PublicIP_access_in extended permit ip host 172.16.0.68 host 125.215.194.223
access-list PublicIP_access_in extended permit ip host 172.16.0.68 host 125.215.194.252
access-list PublicIP_access_in extended permit ip host 172.16.0.68 host 125.215.194.253
access-list PublicIP_access_in extended permit ip host 172.16.0.68 host 125.215.194.232