You can filter e-mail attachments that have a certain file extension. To filter by file extension, create the filter list using the Filter files with specific name patterns option. In the file filter list, use the * wildcard for the file name, and then add the extension on which you want to filter. Filter matching is not case-sensitive.
For example: to filter on all files with an .exe extension, type the file name *.exe*. This ensures that all files with an .exe extension are filtered.
|It is recommended that you type the file name in this format: *.exe*. The second asterisk (*) prevents files with extra characters appended after the file extension from bypassing the filter.|
|It is recommended that you avoid using the * wildcard without specifying an extension and with all file types selected. This can result in every file being detected, regardless of the file name or extension.|