I have a question for you...In the MPLS cloud your routes are learnt via BGP. Why u want filter MPLS - BGP routes getting redistributed in to EIGRP?

If only these four routers are in picture..Some tme it good to use static routes and ....instead of using jargons of tech.

can post the out put of sh service-module s0/0 pls

U will put config some thing like this...interface FastEthernet0/0 ip address 10.10.33.33 255.255.255.224 no ip redirects no ip proxy-arp no ip mroute-cache speed auto duplex auto standby use-bia standby 1 timers 3 10 standby 1 priority 110 preempt ...

Do u have a firewall, firewall like device between router and mail-sever by any chance ?