| 783 | TFTP Protocol (revision 2)K.R. Sollins · obsoleted by RFC 1350 | Unknown | June 1981 |
| 821 | Simple Mail Transfer ProtocolJ. Postel · obsoleted by RFC 2821 | Internet Standard | August 1982 |
| 822 | STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGESD. Crocker · obsoleted by RFC 2822 | Internet Standard | August 1982 |
| 934 | Proposed standard for message encapsulationM.T. Rose, E.A. Stefferud | Unknown | January 1985 |
| 959 | File Transfer ProtocolJ. Postel, J. Reynolds | Internet Standard | October 1985 |
| 1049 | Content-type header field for Internet messagesM.A. Sirbu | Historic | March 1988 |
| 1154 | Encoding header field for internet messagesD. Robinson, R. Ullmann · obsoleted by RFC 1505 | Experimental | April 1990 |
| 1341 | MIME (Multipurpose Internet Mail Extensions): Mechanisms for Specifying and Describing the Format of Internet Message BodiesN. Borenstein, N. Freed · obsoleted by RFC 1521 | Proposed Standard | June 1992 |
| 1342 | Representation of Non-ASCII Text in Internet Message HeadersK. Moore · obsoleted by RFC 1522 | Proposed Standard | June 1992 |
| 1344 | Implications of MIME for Internet Mail GatewaysN. Borenstein | Informational | June 1992 |
| 1345 | Character Mnemonics and Character SetsK. Simonsen | Informational | June 1992 |
| 1421 | Privacy Enhancement for Internet Electronic Mail: Part I: Message Encryption and Authentication ProceduresJ. Linn | Historic | February 1993 |
| 1422 | Privacy Enhancement for Internet Electronic Mail: Part II: Certificate-Based Key ManagementS. Kent | Historic | February 1993 |
| 1423 | Privacy Enhancement for Internet Electronic Mail: Part III: Algorithms, Modes, and IdentifiersD. Balenson | Historic | February 1993 |
| 1424 | Privacy Enhancement for Internet Electronic Mail: Part IV: Key Certification and Related ServicesB. Kaliski | Historic | February 1993 |
| 1521 | MIME (Multipurpose Internet Mail Extensions) Part One: Mechanisms for Specifying and Describing the Format of Internet Message BodiesN. Borenstein, N. Freed · obsoleted by RFC 2045, RFC 2046, RFC 2047, RFC 2048, RFC 2049 | Draft Standard | September 1993 |
| 1522 | MIME (Multipurpose Internet Mail Extensions) Part Two: Message Header Extensions for Non-ASCII TextK. Moore · obsoleted by RFC 2045, RFC 2046, RFC 2047, RFC 2048, RFC 2049 | Draft Standard | September 1993 |
| 1524 | A User Agent Configuration Mechanism For Multimedia Mail Format InformationN. Borenstein | Informational | September 1993 |
| 1543 | Instructions to RFC AuthorsJ. Postel · obsoleted by RFC 2223 | Informational | October 1993 |
| 1556 | Handling of Bi-directional Texts in MIMEH. Nussbacher | Informational | December 1993 |
| 1590 | Media Type Registration ProcedureJ. Postel · obsoleted by RFC 2045, RFC 2046, RFC 2047, RFC 2048, RFC 2049 | Informational | March 1994 |
| 1602 | The Internet Standards Process -- Revision 2Internet Architecture Board, Internet Engineering Steering Group · obsoleted by RFC 2026 | Informational | March 1994 |
| 1652 | SMTP Service Extension for 8bit-MIMEtransportJ. Klensin, N. Freed, M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 6152 | Draft Standard | July 1994 |
| 1700 | Assigned NumbersJ. Reynolds, J. Postel · obsoleted by RFC 3232 | Historic | October 1994 |
| 1741 | MIME Content Type for BinHex Encoded FilesP. Faltstrom, D. Crocker, E. Fair | Informational | December 1994 |
| 1896 | The text/enriched MIME Content-typeP. Resnick, A. Walker | Informational | February 1996 |
| 2045 | Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message BodiesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 2046 | Multipurpose Internet Mail Extensions (MIME) Part Two: Media TypesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 2047 | MIME (Multipurpose Internet Mail Extensions) Part Three: Message Header Extensions for Non-ASCII TextK. Moore | Draft Standard | November 1996 |
| 2048 | Multipurpose Internet Mail Extensions (MIME) Part Four: Registration ProceduresN. Freed, J. Klensin, J. Postel · obsoleted by RFC 4288, RFC 4289 | Best Current Practice | November 1996 |