After I install that ISA Server?s Message Screener on the Exchange Server (to make the Exchange Server listen to the SMTP traffic on ISA) all internal e-mails take about one minute to be delivered, which is unacceptable (with the e-mail client launched on the Exchange Server itself and the e-mail sent to yourself). The external e-mails also take longer but that?s probably related to the internal e-mail. If I uninstall that plug-in (the Message Screener) from Exchange, the delay problem disappears but my external e-mail won?t work. I installed all the service packs (Win2k SP2, Exchange SP3and ISA SP1). Any idea, anyone? Thanks alot, Stelian