| Name,Template,Reference |
| CPIM,,[RFC3862] |
| delivery-status,,[RFC1894] |
| disposition-notification,,[RFC3798] |
| example,,[RFC4735] |
| external-body,,[RFC2045][RFC2046] |
| feedback-report,,[RFC5965] |
| global,,[RFC6532] |
| global-delivery-status,,[RFC6533] |
| global-disposition-notification,,[RFC6533] |
| global-headers,,[RFC6533] |
| http,message/http,[RFC-ietf-httpbis-p1-messaging-26] |
| imdn+xml,,[RFC5438] |
| news - OBSOLETE,message/news,[RFC5537][Henry_Spencer] |
| partial,,[RFC2045][RFC2046] |
| rfc822,,[RFC2045][RFC2046] |
| s-http,,[RFC2660] |
| sip,,[RFC3261] |
| sipfrag,,[RFC3420] |
| tracking-status,,[RFC3886] |
| vnd.si.simp - OBSOLETE,message/vnd.si.simp,[Nicholas_Parks_Young] |
| vnd.wfa.wsc,message/vnd.wfa.wsc,[Mick_Conley] |
