[exim] SMTP AUTH using pwcheck in exim

    I have enabled SMTP AUTH in my mail server running with exim.4.62 on Linux. While trying to send mail from client through InterScan Messaging Secirity Suite (IMSS) from TrendMicro to the mail server, mail are going from some pcs where as from PCs which are connecting to the mail server through, PIX Firewall, it is not getting authenticated. Where as when we try from these PCs to connect directly to mail server, bypassing IMSS server, it is getting authenticated. Is there something like, when it is passing through 2 firewalls, (PIX and IMSS), authentication will not happen.

Lekshmi A. R.
Computer Programmer
DCG, DIT
Canara Bank
Naveen Complex
#14, M. G. Road
Bangalore - 560 001
Ph: (080) 2558 4040 - 286
               2559 8548