RFC 2034: SMTP Service Extension for Returning Enhanced Error Codes

This memo defines an extension to the SMTP service [RFC-821, RFC-1869] whereby an SMTP server augments its responses with the enhanced mail system status…

Read RFC 2034 on the RFC Editor

Outgoing relationships (4 related RFCs)

Informative reference — RFC 821: Simple Mail Transfer Protocol
Informative reference — RFC 1894: An Extensible Message Format for Delivery Status Notifications
Informative reference — RFC 1869: SMTP Service Extensions
Informative reference — RFC 1893: Enhanced Mail System Status Codes

Incoming relationships (16 related RFCs)

Normatively referenced by — RFC 3801: Voice Profile for Internet Mail - version 2 (VPIMv2)
Normatively referenced by — RFC 4954: SMTP Service Extension for Authentication
Normatively referenced by — RFC 5429: Sieve Email Filtering: Reject and Extended Reject Extensions
Normatively referenced by — RFC 4550: Internet Email to Support Diverse Service Environments (Lemonade) Profile
Normatively referenced by — RFC 5550: The Internet Email to Support Diverse Service Environments (Lemonade) Profile
Normatively referenced by — RFC 6710: Simple Mail Transfer Protocol Extension for Message Transfer Priorities
Informatively referenced by — RFC 4409: Message Submission for Mail
Informatively referenced by — RFC 6409: Message Submission for Mail
Informatively referenced by — RFC 2033: Local Mail Transfer Protocol
Informatively referenced by — RFC 2421: Voice Profile for Internet Mail - version 2
Informatively referenced by — RFC 2476: Message Submission
Informatively referenced by — RFC 2532: Extended Facsimile Using Internet Mail
Informatively referenced by — RFC 2852: Deliver By SMTP Service Extension
Informatively referenced by — RFC 2487: SMTP Service Extension for Secure SMTP over TLS
Informatively referenced by — RFC 2530: Indicating Supported Media Features Using Extensions to DSN and MDN
Informatively referenced by — RFC 3117: On the Design of Application Protocols