RFC 2221 · PROPOSED STANDARD · 1997
SUN · 14 JUN 2026
IMAP4 Login Referrals
Overview
RFC 2221, “IMAP4 Login Referrals”, is a Proposed Standard document published in October 1997 by M. Gahrns. The canonical text is published by the RFC Editor.
Abstract
When dealing with large amounts of users and many IMAP4 [RFC-2060] servers, it is often necessary to move users from one IMAP4 server to another. Login referrals allow clients to transparently connect to an alternate IMAP4 server, if their home IMAP4 server has changed. [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 2221 is hosted at rfc-editor.org. Available in TXT,HTML.
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