Boarderware Mail Firewall and PIX configuration

We have got two Cisco PIXes 525 (PIXA, PIXB (failover) ) connected to another two PIXes (PIX1, and PIX2),,,,we have got no administrative control over other two PIXes (i.e. PIX1, PIX2).

The outside address for us (our company) is ip address between (PIXA,PIXB) and (PIX1, PIX2) which is: 10.1.1.0/24,,,and in turns PIX1, PIX2 connect to outside world (public ip addresses)

I have got two mail firewall devices within our dmz area (PIXA, PIXB)

First mail firewall (mfa)192.168.101.3, and Second mail firewall (mfb)192.168.101.5

Our two clustered Exchange mail servers in inside area (not DMZ), with Clustered ip address is 192.168.2.23

Function of the mail firewall (Boarderware MX200) is : receives emails from outside and delivers them to exchange and other way around receives emails from exchange and delivers them to outside.

Note: We used to use format 192.168.101.x for any ip addresses within DMZ region

The configuration with our firewall (PIXA,PIXB) are :

static (inside,dmz) 192.168.101.253 192.168.2.23 255.255.255.255 0 0
static (dmz,outside) 10.1.1.132 192.168.101.3 netmask 255.255.255.255 0 0
access-list dmz permit tcp host 192.168.101.3 host 192.168.101.253 eq smtp
access-list outside permit tcp any host 10.1.1.132 eq smtp
access-list outside permit tcp host 10.1.1.132 host 192.168.2.23 eq smtp,,,,I do not why this was there,,,,I guess it is wrong!!!!

access-group outside in interface outside
access-group dmz in interface dmz

We used second mail firewall (mfb), we have created cluster for the load balancing with the first one mail firewall.

We have created same rules as first mail firewall (mfa) ,,i.e like below:
static (inside,dmz) 192.168.101.253 192.168.2.23 255.255.255.255 0 0,,,this is already there
static (dmz,outside) 10.1.1.202 192.168.101.5 netmask 255.255.255.255 0 0
access-list dmz permit tcp host 192.168.101.5 host 192.168.101.253 eq smtp
access-list outside permit tcp any host 10.1.1.202 eq smtp

In order to eliminate the resources of the the problem , what test should I do ?

For more clarification, please see this diagram from BoarderWare Mail Firewall Documentation
http://img402.imageshack.us/img402 [...] reazm7.jpg

Yes, as it can bee seen in the configuration that I have posted
static (dmz,outside) 10.1.1.132 192.168.101.3 netmask 255.255.255.255 0 0

Yes, as it can bee seen in the configuration that I have posted
access-list outside permit tcp any host 10.1.1.132 eq smtp

As you have see both of them are there.

You meant to say MXtreme Mail Firewall instead of servers ,,,didn't you ?