3. Specify whether to apply this rule to inbound mails, internal mails,
outbound mails or all. To understand how GFI MailSecurity
determines whether a mail is inbound, internal or outbound, see the
chapter Advanced Use .
4. Specify which attachments to block. You can specify a list of
attachments types or names to block, or you can specify a list of
attachments which are allowed through, such as doc or txt.
Adding a file type or file name to block
To add a file to block, click on the `Add' button. You can use asterisk
(*) wildcards to specify file names that have certain strings in the
name. For example specifying *orders*.mdb blocks files which contain
the string orders in the file name. *.jpg will block all jpg files.
You can also block attachments based on size. To do this simply
select `Block files greater than' and enter attachment size.
The attachment checking rule `Actions' tab.
Configuring Content & Attachment checking