RFC 539 · UNKNOWN · 1973 MON · 14 SEP 2026

Thoughts on the mail protocol proposed in RFC 524

By D. Crocker, J. Postel · Published July 1973 · DOI 10.17487/RFC0539

Overview

RFC 539, “Thoughts on the mail protocol proposed in RFC 524”, is an Unknown document published in July 1973 by D. Crocker, J. Postel. The canonical text is published by the RFC Editor.

What “Unknown” means

The standards-track status of this early RFC was never formally classified.

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