Symantec 10490452 Administration Guide - Page 111

Configuring email filtering 111 Managing policy resources Table 4-15 Add Attachment List page. For the last three choices, all characters are interpreted literally; wildcards are not allowed. Attachment characteristics for attachment lists Characteristic True file type True file class File name Extension MIME-type Description Examples Specifies an attachment type based on direct inspection of the type of file. You can use this to match files whose extensions may not accurately reflect their true file types. Each file type is a member of a specific file class. Microsoft Word for Windows Specifies an attachment type based on the class of Word Processor Document file. You can use this to match files whose extensions may not match their true file classes. Part or all of a file. A partial match for a file will match a file, such as "oxy" for "oxygen.txt". oxy oxygen oxygen.txt A period followed by usually three letters at the end of a file that, by convention, indicates the type of the file. .txt .exe .text .zip The MIME type of the attachment in the email message. MIME is a standard for email attachments. text/plain image/gif application/msword application/octet-stream For a technical description of MIME, see the following RFC: http://www.ietf.org/rfc/rfc2045.txt To add an attachment list 1 In the Control Center, click Policies > Attachment Lists. 2 Click Add. 3 In the Attachment list name box, type a name for the attachment list. This is the name that appears on the Attachment Lists page and as the Attachment List in the Conditions section when configuring a policy. 4 In the Configure Attachment Types box, either: ■ Click the first radio button to match files based on the actual type or class of the file, even if that type or class does not match the extension. Choose True file type or True file class. Then click on the classes or