Hello, recently I had a certain group using the FW client software to pass through ISA to retrieve POP mail from an outside ISP mail server. That worked fine. Until last week, when a telnet application seemed to frequently hang and freeze. I then uninstalled the FW client and left the proxy settings in the browser only.Telnet app works fine now. These clients are still gaining access to the outside server for their mail. I am reading Shinder's book on ISA and have researched elsewhere but am not finding any answers why a web proxy client (not SecureNAT or FW client) can continue to access an outside mailserver. Any help would be appreciated. thanks, Peter --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.426 / Virus Database: 239 - Release Date: 12/2/2002