A single file Web page saves all the elements of a Web site, including text and graphics, into a single file. This encapsulation lets you publish your whole Web site as a single MIME (MIME: A list of standards for conveying multimedia resources via Internet connections. The MIME type informs a program what the object contains (for instance, graphics, sounds, or videos).) encapsulated aggregate HTML document (MHTML) file or send an entire Web site as an e-mail message or attachment. This format is supported by Internet Explorer 4.0 and later.
Security The recipient of an e-mail message may not receive an attachment depending on the attachment file type. For example, program file type (.exe) attachments are blocked by Microsoft Outlook. The security level of file types is, in some cases, set by the e-mail server administrator. Make sure to provide an alternative method for recipients to access the attachment.