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UTORmail: Virus Filtering (Advanced)

IMPORTANT NOTE: This page documents anti-virus procedures used after March 30, 2006. Please see for procedures used before that date.

This documentation has been written for technical support staff, the technically advanced, and the curious. Those looking for an overview and basic instructions, please visit


  1. The anti-virus filter at the post office does not replace the need to install and maintain up-to-date anti-virus software on your computer . The anti-virus filter and anti-virus software work together to give you the best possible protection against virus delivery and infection. To download Symantec® Norton Anti-Virus (NAV) software, please visit the University's UTORprotect site. The UTORprotect site is also an excellent resource on Best Practices for protection against viruses.
  2. Only messages from other post offices are filtered. Messages from other UTORmail customers are not. If you receive a virus internally, please report the virus to . You will need to send the security administrator the full header of the message in question. The full header is required in order to track the message's point of origin. Instructions for viewing the full header of a message are available under the E-mail Security section of UTORprotect.

UTORmail Mail Processing Flowchart

In the case where a message contains one or more attachments suspected as viruses, the UTORmail post office will do the following:

Link to mail processing Flow Chart

TABLE of Attachment Types Renamed

.zip Zip Compression/Archive

TABLE of Attachment Types removed, replaced with advisory text, and resulting message put in junk-mail folder

.ace ACE Archiver Compression file
.ade Microsoft Access project extension
.adp Microsoft Access project
.bas Microsoft Visual Basic class module
.bat Batch file
.chm Compiled HTML Help file
.cla Java Class Files
.class Java Class Files
.cmd Microsoft Windows NT Command script
.com Microsoft MS-DOS program
.cpl Control Panel extension
.crt Security certificate
.cs Microsoft C# App executed by .NET framework
.eml MS Outlook Express email
.email MS Outlook Express email
.exe Program .hlp Help file
.hta HTML program
.inf Setup Information
.ins Internet Naming Service
.isp Internet Communication settings
.js JScript file
.jse Jscript Encoded Script file
.lnk Shortcut
.mde Microsoft Access MDE database
.msc Microsoft Common Console document
.msi Microsoft Windows Installer package
.msp Microsoft Windows Installer patch
.mst Microsoft Visual Test source files
.ocx Microsoft OLE control
.pcd Photo CD image, Microsoft Visual compiled script
.pif Shortcut to MS-DOS program
.reg Registration entries
.scr Screen saver
.sct Windows Script Component
.shs Shell Scrap object
.shb Shell Scrap object
.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

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