RFC 1846: SMTP 521 Reply Code
In plain English — editorial summary, not part of the RFC
This memo defines a new SMTP ([1]) reply code, 521, which one may use to indicate that an Internet host does not accept incoming mail.
Document record
- Document ID
- RFC1846
- Published
- September 1995
- Authors
- A. Durand; F. Dupont
- Status
- EXPERIMENTAL
- Stream
- IETF
- Area
- app
- Pages
- 4
- Also known as
- —
- Updated by:
- RFC 7504
Topics
Referenced by
One later RFC formally updates or obsoletes part of this document.
Related documents
Ranked automatically by shared keywords, IETF area and stream — not by editorial selection.
- RFC 1845SMTP Service Extension for Checkpoint/RestartCurrent
September 1995
- RFC 1830SMTP Service Extensions for Transmission of Large and Binary MIME MessagesObsoleted
August 1995
- RFC 1869SMTP Service ExtensionsObsoleted
November 1995
- RFC 1891SMTP Service Extension for Delivery Status NotificationsObsoleted
January 1996
- RFC 1893Enhanced Mail System Status CodesObsoleted
January 1996
- RFC 1653SMTP Service Extension for Message Size DeclarationObsoleted
July 1994
- RFC 1985SMTP Service Extension for Remote Message Queue StartingCurrent
August 1996
- RFC 2033Local Mail Transfer ProtocolCurrent
October 1996
Also filed under
About this page
The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.
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