Smtp Proxy: Email Content; Allow Only Safe Content Types - Watchguard Firebox X15 User Manual

SMTP proxy: Email content

Certain kinds of content embedded in email can be a security threat to your network. Other kinds of content
can decrease the productivity of your users. On the SMTP Content tab, you limit content types, and block
specified path patterns and URLs. You can use the asterisk (*) as a wildcard character.
From this tab you can:

Allow only safe content types

Add or remove a content type
Deny unsafe file name patterns
Add or remove file name patterns
Allow only safe content types
The headers for email messages include a Content Type header to show the MIME type of the email and of any
attachments. The content type or MIME type tells the computer the types of media the message contains.
Select the check box for this feature if you want to limit the content types that you allow through the proxy.
When you select this check box, only the content types shown in the text box are allowed. The format of a
MIME type is type/subtype. For example, if you want to allow JPEG images, you add
use the asterisk (*) as a wildcard character. To allow any image format, you add
User Guide
Proxy Settings
. You can also
image/jpg
to the list.
image/*
147