Those were the details. I did find something on EventID.net that pointed me to the command XEXCH50. I then found a KB article (812455) about that command, which I entered into the SMTP filter. Since entering that command into the SMTP filter 10 minutes ago, the error has not recurred. I'll keep watching for it. Rob ________________________________ From: Jim Harrison [mailto:Jim@xxxxxxxxxxxx] Sent: Monday, January 31, 2005 11:45 AM To: [ISAserver.org Discussion List] Subject: [isalist] RE: SMTP error http://www.ISAserver.org Details? Your Application event log has the details of that alert. ------------------------------------------------------- Jim Harrison MCP(NT4, W2K), A+, Network+, PCG http://isaserver.org/Jim_Harrison/ <http://isaserver.org/Jim_Harrison/> http://isatools.org <http://isatools.org/> Read the help / books / articles! ------------------------------------------------------- ________________________________ From: Rob Moore [mailto:RMoore@xxxxxxxx] Sent: Monday, January 31, 2005 08:42 To: [ISAserver.org Discussion List] Subject: [isalist] SMTP error http://www.ISAserver.org Hello all-- This weekend I also put my Exchange server onto my ISA 2004 server. This all seems to be going fine, but an error is coming up in the Application log of the ISA server every couple of minutes: "An unknown SMTP command was used." Source: Smtp Evt, Event ID: 20031. Mail seems to be flowing normally. Is this a problem? It'd be nice to get the errors to go away. Related info: The message screener is installed on a separate computer (not on the ISA server or the Exchange server), but I haven't been directing SMTP traffic through it yet. Later today or tomorrow. Thanks, Rob ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: jim@xxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=isalist Report abuse to listadmin@xxxxxxxxxxxxx ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: rmoore@xxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=isalist Report abuse to listadmin@xxxxxxxxxxxxx All mail to and from this domain is GFI-scanned.