That is a good point, I actually got the idea from a client of ours. See we email attachments all the time to clients and sometimes the employees will say they never got the attachment when we know we sent it and then we have to second guess what is going on. Then other clients do this :"Sorry, the security policy of (blank) refuses such file extensions : *.vbs;*.vbe;*.js;*.jse;*.css;*.wsh;*.sct;*.hta;*.shs;*.as;*.pif;*.scr;*. com;*.bat;*.exe Best regards, IT security manager" Now I thought that is a nice feature. That way you know up front that your attachment is going to be denied and you have to come up with another solution. Since more and more companies are now starting to block specific attachments it would be nice to be notified. Dale -----Original Message----- From: John Tolmachoff (Lists) [mailto:johnlist@xxxxxxxxxxxxxxxxxxx] Sent: Friday, September 05, 2003 11:41 AM To: [ISAserver.org Discussion List] Subject: [isalist] RE: virus blocking http://www.ISAserver.org > I don't know if this is for this group or not but we have exchange and > isa servers. We would like to start blocking some types of attachments > and send a return email back to the sender that it was blocked. > Is this something you do in isa or exchange or both? > Any one know how? Do not even think about sending notifications to senders unless you know what you are doing. Where do you think 1/3 of all the traffic on the internet is right now, stupid notifications to FORGED senders from misconfigured mail servers. If you want to take these kind of steps, you really need to be aware of the consequences. John Tolmachoff MCSE CSSA Engineer/Consultant eServices For You www.eservicesforyou.com ------------------------------------------------------ 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: 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: musser@xxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')