For those clients using the AFFCOM / UniPro e-mail server, we have further strengthened protection against possible virus infection. Most viruses are carried as e-mail attachments, thus we are blocking specific file extensions that are often the culprit. The e-mail server will automatically block all files ending in the extensions listed below. Since some files ending with these extensions, particularly ZIP files, may be files that you wish to receive; the system will send you a message advising that a file with a specific blocked extension has been detected at the server. In this case you can advise the sender to resend the file by renaming the file extension to something other than those listed below. You can simply rename it to the proper extension once you have received it.

• .ade Microsoft Access project extension
• .adp Microsoft Access project
• .app Application file
• .bas Microsoft Visual Basic class module
• .bat Batch file
• .chm Compiled HTML Help file
• .class Java class file
• .cmd Microsoft Windows NT Command Script
• .com Microsoft MS-DOS program
• .cpl Control Panel extension
• .crt Security certificate
• .dll Windows dynamic link library
• .exe Excutable program
• .fxp Microsoft Visual FoxPro compiled program
• .hlp Help file
• .hta HTML application
• .ins Internet Naming Service
• .isp Internet Communication settings
• .jse JScript Encoded Script file
• .lnk Shortcut
• .mda Microsoft Access add-in program
• .mdb Microsoft Access program
• .mde Microsoft Access MDE database
• .mdt Microsoft Access data file
• .mdw Microsoft Access workgroup
• .mdz Microsoft Access wizard program
• .msc Microsoft Common Console Document
• .msi Microsoft Windows Installer package
• .msp Windows Installer patch
• .mst Visual Test source files
• .ops Microsoft Office profile settings file
• .pcd Photo CD image or Microsoft Visual Test compiled script
• .pif Shortcut to MS-DOS program
• .prf System file
• .prg Program source file
• .reg Registration entries
• .scf Windows Explorer command file
• .scr Screen saver
• .sct Windows Script Component
• .shb Windows shortcut
• .shs Shell Scrap Object
• .url Uniform Resource Locator (Internet shortcut)
• .vb VBScript file
• .vbe VBScript Encoded Script file
• .vbs VBScript file
• .wsc Windows Script Component
• .wsf Windows Script file
• .wsh Windows Script Host Settings file
• .zip Zipped file

We have taken this precaution since viruses are often automatically e-mailed to you from infected computers whose user is known to you. In these cases, many assume the attachment must be safe since the sender is recognized. Not always being the case, we have provided this additional measure of protection and security.

For clients not on the AFFCOM / UniPro e-mail server, be very cautious when an attachment with the above extension is received. You should always confirm with the sender that the file is legitimate and safe.