.MIM File Extension

An MIM file is an encoded file used by email programs that contains 8-bit data or other characters besides the US ASCII character set. It is used to support 8-bit content, such as file attachments, instead of standard 7-bit messages that are normally sent over email. MIM files typically includes the MIME version, the content type, and the encoding method.

MIM files may either appear as part of an email message, or they may be included as a separate attachment. They are often automatically decoded by email programs, but can also be decoded using a separate decoding utility.