- The Internet Mail Protocol (RFC 822)
- ftp://ds.internic.net/rfc/rfc822.txt
- MIME Protocols (RFC 1521/1522)
- http://www.ncsa.uiuc.edu/SDG/Software/Mosaic/Docs/rfc1521.txt
- http://www.oac.uci.edu/indiv/ehood/MIME/MIME.html
- ftp://ds.internic.net/rfc/rfc1521.txt
- Introductory documentation on MIME
- ftp://ftp.uu.net/networking/mail/mime/mime.ps (Postscript)
- ftp://ftp.uu.net/networking/mail/mime/mime.txt (plain text)
- A definitive list of registered MIME types
- ftp://ftp.isi.edu/in-notes/iana/assignments/media-types/
- The multipart/form-data MIME content-type (RFC 1867 Experimental)
- ftp://ds.internic.net/rfc/rfc1867.txt (Note new URL)