McAfee MAP-3300-SWG Product Guide - Page 138
Content Handling Settings — Email Options — Text and binary MIME types, About MIME formats
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Overview of Email features Email Policies Table 115 Option definitions Option Definition Take action under the following circumstances • Never - Select this option if you do not need the feature. • When one or more email headers have no value - Select this option to detect any suspicious headers. • When one or more of the following headers are missing or empty - Select this option to specify the headers, such as From, Sender, and Reply-to. For a full list of headers, see RFC 2822. Action And also If either of the above actions results in an alert Provides a choice of actions against the email message. Provides a choice of secondary actions for both the original email message and for notification email messages. Provides a choice of the alert message sent when an action triggers an alert message. Content Handling Settings - Email Options - Text and binary MIME types Use this page to specify special MIME types as text or binary to improve the efficiency of the scanning. Email | Email Policies | Scanning Policies | Scanner Options | Content Handling | Email Options The appliance handles common MIME types. You need only specify any new or unusual MIME types here. Table 116 Option definitions Option Treat the following MIME types as text attachments Treat the following MIME types as binary attachments Definition Allows you to build a list of text MIME types. Allows you to build a list of binary MIME types. About MIME formats Multipurpose Internet Mail Extensions (MIME) is a communications standard that enables the transfer of non-ASCII formats over protocols, like SMTP, that support only 7-bit ASCII characters. Email | Email Policies | Scanning Policies [Scanner Options] -- Content handling | Email Options | Text and binary MIME types Examples of non-ASCII formats, include: • 8-bit audio • Video files • Character sets of many non-English languages MIME defines different ways of encoding the non-ASCII formats so that they can be represented using characters in the 7-bit ASCII character set. MIME also defines extra email headers that contain further information: • Version of MIME used. • Type of content in the MIME message. 138 McAfee Email and Web Security Appliances 5.6.0 Product Guide