message/*
24 registered types — the explained ones link through.
/
- message/bhttpregistered
- message/cpimregistered
- message/delivery-statusregistered
- message/disposition-notification.disposition-notificationregistered
- message/external-bodyregistered
- message/feedback-reportregistered
- message/global.u8msgregistered
- message/global-delivery-status.u8dsnregistered
- message/global-disposition-notification.u8mdnregistered
- message/global-headers.u8hdrregistered
- message/httpregistered
- message/imdn+xmlregistered
- message/mlsregistered
- message/newsde facto
- message/ohttp-reqregistered
- message/ohttp-resregistered
- message/partialregistered
- message/rfc822.eml .mime .mhtregistered
- message/s-httpde facto
- message/sipregistered
- message/sipfragregistered
- message/tracking-statusregistered
- message/vnd.si.simpde facto
- message/vnd.wfa.wsc.wscregistered
"Registered" rows are in the IANA registry; "de facto" types circulate unregistered. Registry mirror: mime-db (MIT).