Edit locations (format for sending mail to Internet addresses)
IBM® Lotus Notes® Internet-style mail uses secure MIME (S/MIME) protocols for sending and receiving encrypted and signed mail. Internet-style Notes® mail is required to secure mail to people over the Internet, and is optional to secure your mail to other Notes users.
To choose which locations should use MIME format for outgoing mail, choose (Macintosh OS X users: ), click Mail, click the "Internet-style Mail Options" button, then click the Locations button under "MIME format for sending mail."
Select either Rich Text Format or MIME Format in the corresponding column to the left of the location name. You can only select one format for each location. If you frequently send mail to people over the Internet, it is recommended to use MIME format. But, if you send mail only to other Notes users, it is recommended to use Rich Text Format, which is the default.
To enable MIME format in every location listed, click the "Select MIME at all locations" button. To enable Rich Text Format in every location that supports rich text, click the "Select Rich Text at all locations that support rich text" button.