I have windows 2000 server installed as domain controller and exchange 2003 server installed on windows 2000 server as member server. ISA 2000 server is installed as front end server. Exchange server is published through ISA server and all the traffic is going through ISA server. Now the problem is that we are receiving emails multiple times and from the last two days the number of repeated emails increased dramatically. Can anybody expalin if an email is received mutiple times, the problem will be at sender's email server or recipient email server. What i have to do to resolve this issue.
Microsoft outlook 2003 is installed at clients end and is configued as exchange server client.