RFC 577 · UNKNOWN · 1973
MON · 15 JUN 2026
Mail priority
Overview
RFC 577, “Mail priority”, is an Unknown document published in October 1973 by D. Crocker. The canonical text is published by the RFC Editor.
What “Unknown” means
The standards-track status of this early RFC was never formally classified.
Read this RFC
The canonical text of RFC 577 is hosted at rfc-editor.org. Available in TXT,PDF,HTML.
Other RFCs from 1973
- RFC 576 Proposal for modifying linking
- RFC 578 Using MIT-Mathlab MACSYMA from MIT-DMS Muddle
- RFC 579 Traffic statistics
- RFC 574 Announcement of a Mail Facility at UCSB
- RFC 580 Note to Protocol Designers and Implementers
- RFC 573 DATA AND FILE TRANSFER - SOME MEASUREMENT RESULTS
- RFC 581 Corrections to RFC 560: Remote Controlled Transmission and Echoing Telnet Option
- RFC 582 Comments on RFC 580: Machine readable protocols