i am testing out email servers for a friend of mine. here is the setup - 1GHz Athlon, 512 MB Ram, 30GB Hdd, win2k serv / iis 5 / imail, mdaemon and other email servers that offer a trial period. here is the problem i am running into. whenever i am transferring a file via http, whether it be an mp3 or zip, and i check the email via the webmail option, the transfer of the mp3 or zip stops. the http server for iis 5 is running on port 80 and the webmail server for the email server are running on ports 6000 and 6200. what causes this? do i need a dedicated mail server computer and web server computer? if i am transferring the same file via ftp, no problems with checking the webmail. please help...