Network Working Group J. Myers
Request for Comments: 1939 Carnegie Mellon
STD: 53 M. Rose
Obsoletes: 1725 Dover Beach Consulting, Inc.
Category: Standards Track May 1996
Post Office Protocol - Version 3
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Table of Contents
1. Introduction ................................................ 2
2. A Short Digression .......................................... 2
3. Basic Operation ............................................. 3
4. The AUTHORIZATION State ..................................... 4
QUIT Command ................................................ 5
5. The TRANSACTION State ....................................... 5
STAT Command ................................................ 6
LIST Command ................................................ 6
RETR Command ................................................ 8
DELE Command ................................................ 8
NOOP Command ................................................ 9
RSET Command ................................................ 9
6. The UPDATE State ............................................ 10
QUIT Command ................................................ 10
7. Optional POP3 Commands ...................................... 11
TOP Command ................................................. 11
UIDL Command ................................................ 12
USER Command ................................................ 13
PASS Command ................................................ 14
APOP Command ................................................ 15
8. Scaling and Operational Considerations ...................... 16
9. POP3 Command Summary ........................................ 18
10. Example POP3 Session ....................................... 19
11. Message Format ............................................. 19
12. References ................................................. 20
13. Security Considerations .................................... 20
14. Acknowledgements ........................................... 20
15. Authors' Addresses ......................................... 21
Appendix A. Differences from RFC 1725 .......................... 22
Myers & Rose Standards Track [Page 1]
RFC 1939 POP3 May 1996
