SMTP Operational Experience in Mixed IPv4/v6 Environments
RFC 3974, “SMTP Operational Experience in Mixed IPv4/v6 Environments”, is an Informational document published in January 2005 by M. Nakamura, J. Hagino. The canonical text is published by the RFC Editor.
Abstract
This document discusses SMTP operational experiences in IPv4/v6 dual stack environments. As IPv6-capable SMTP servers are deployed, it has become apparent that certain configurations of MX records are necessary for stable dual-stack (IPv4 and IPv6) SMTP operation. This document clarifies the existing problems in the transition period between IPv4 SMTP and IPv6 SMTP. It also defines operational requirements for stable IPv4/v6 SMTP operation.
This document does not define any new protocol. This memo provides information for the Internet community.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
The canonical text of RFC 3974 is hosted at rfc-editor.org. Available in TXT,HTML.
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