>1. server =windows server2003 (look title up)
>2.They receve emails by my program.
>>What is the network on the server - is it Novell? What e-mail software they are using? Are you sending e-mails from your application?
>>
Are you sending e-mails with attachments? Try for the time being disable e-mail functionality in your application. It may be irrelevant, but I remember long time ago I was doing some tests (using SendMails from Nigel Coates class, if memory serves) and our Network Admin complained that my tests crashed the Network. I think we used Novell at that time.