Add Each Part

Use the insertPart() function of RWMimeMultipart to add each MIME part to the multipart:

RWMimePart part1;

// ... fill part1 with content.

RWMimePart part2;

// ... fill part2 with content.

RWMimeMultipart multipartMessage;

multipartMessage.insertPart(part1);

multipartMessage.insertPart(part2);

Add the parts in the order in which they should appear in the multipart.

An RWMimeMultipart must not contain itself, either directly or indirectly. A part that contains itself cannot be represented as a string.