RFC 2505 · BEST CURRENT PRACTICE · 1999
SUN · 14 JUN 2026
Anti-Spam Recommendations for SMTP MTAs
Overview
RFC 2505, “Anti-Spam Recommendations for SMTP MTAs”, is a Best Current Practice document published in February 1999 by G. Lindberg. The canonical text is published by the RFC Editor.
Abstract
This memo gives a number of implementation recommendations for SMTP, MTAs (Mail Transfer Agents, e.g. sendmail,) to make them more capable of reducing the impact of spam. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
What “Best Current Practice” means
Documents the IETF community's recommended operational or procedural practice rather than a protocol specification.
Read this RFC
The canonical text of RFC 2505 is hosted at rfc-editor.org. Available in TXT,HTML.
Other RFCs from 1999
- RFC 2504 Users' Security Handbook
- RFC 2506 Media Feature Tag Registration Procedure
- RFC 2503 MIME Types for Use with the ISO ILL Protocol
- RFC 2507 IP Header Compression
- RFC 2502 Limitations of Internet Protocol Suite for Distributed Simulation the Large Multicast Environment
- RFC 2508 Compressing IP/UDP/RTP Headers for Low-Speed Serial Links
- RFC 2501 Mobile Ad hoc Networking : Routing Protocol Performance Issues and Evaluation Considerations
- RFC 2509 IP Header Compression over PPP