connection to backend smtp server is being reset

I am trying to connect, from a workstation, to backend smtp server via
keepalived lb using command telnet 192.168.0.249 25.  The connection
is being reset.

trace take on machine running keepalived
-------------------------------------------------------------

90 18:28:37.116176 192.168.0.209 192.168.0.249 TCP 66 54121 > smtp
[SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=4 SACK_PERM=1
112 18:28:43.116442 192.168.0.209 192.168.0.249 TCP 62 [TCP
Retransmission] 54121 > smtp [SYN] Seq=0 Win=8192 Len=0 MSS=1460
SACK_PERM=1

trace taken from machine running postfix smtp server
------------------------------------------------------------------------------

135 18:29:32.180241 192.168.0.250 192.168.0.244 TCP 74 59566 > smtp
[SYN] Seq=0 Win=14600 Len=0 MSS=1460 SACK_PERM=1 TSval=4616943 TSecr=0
WS=16
136 18:29:32.180292 192.168.0.244 192.168.0.250 TCP 74 smtp > 59566
[SYN, ACK] Seq=0 Ack=1 Win=14480 Len=0 MSS=1460 SACK_PERM=1
TSval=2535443 TSecr=4616943 WS=32
137 18:29:32.180435 192.168.0.250 192.168.0.244 TCP 66 59566 > smtp
[ACK] Seq=1 Ack=1 Win=14608 Len=0 TSval=4616943 TSecr=2535443
138 18:29:32.180480 192.168.0.250 192.168.0.244 TCP 66 59566 > smtp
[RST, ACK] Seq=1 Ack=1 Win=14608 Len=0 TSval=4616943 TSecr=2535443


Not sure why it is not working.


my topology is as follows.

           lb1 (keepalived server)  host mx...   eth0  vip .249, eth1 ip .250
                     ||
                     ||
                     ||
          ========================
          ||                                             ||
          ||                                             ||
          ||                                             ||
host mx1...  ip .244 (postfix smtp)     host mx2... ip .245 (postfix smtp)

On each m1... and mx2... mail servers I added

My config is...

global_defs  {
lvs_id  LVS_1
}
vrrp_instance  VI_1  {
       interface  eth1
       state  MASTER
       virtual_router_id  51
       priority  101                     # 101 on master, 100 on backup
       advert_int  1
       smtp_alert
authentication  {
auth_type  PASS
auth_pass  pass

}

       virtual_ipaddress  {
           192.168.0.249/24  brd  192.168.0.255  dev  eth0
}

 virtual_server  192.168.0.249  25  {
   delay_loop  60
   lb_algo  rr
   lb_kind  DR
   protocol  TCP
   persistence_timeout  360

   real_server 192.168.0.245 25 {
   weight 1
       TCP_CHECK {
               connect_timeout 3
       connect_port 25
       nb_get_retry 3
       delay_before_retry 3
       }
   }
   real_server 192.168.0.244 25 {
       weight 1
       TCP_CHECK {
               connect_timeout 3
       connect_port 25
       nb_get_retry 3
       delay_before_retry 3
       }
   }
}

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