Attachment blocking prevents email messages containing suspicious attachments from being delivered. ScanMail Mobile can block attachments according to the following:

The extension of an attachment identifies the file type, for example .doc, .exe, or .dll. Many viruses/malware are closely associated with certain types of files. By configuring ScanMail Mobile to block according to file type, administrators can decrease the security risk to Exchange servers from those types of files. Similarly, specific attacks are often associated with a specific file name.

Recipients for messages can match one attachment blocking exception or the attachment blocking global rule based on priority. If the recipient matches an attachment blocking exception, then targets selected in the exception are excluded from attachment blocking global rule. If the recipient does not match any attachment blocking exceptions, then the attachment blocking global rule is applied.