Multipurpose Internet Mail Extensions ( MIME ) is an Internet Standard for the format of e-mail. Virtually all Internet e-mail is transmitted via SMTP in MIME format.
You may view the list of Mime Types here.
1. To add Mime Types, select a Predefined MimeType from the select list or type in the new mimetype in the textbox
2. Then type in the file extension in the File Extension column. Separate multiple file extensions with spaces.
3. Click Save Changes
4. You may add 3 Mime Types at once
5. To delete it , tick on the Delete column and click Save Changes