# Recommendation X.419 (11/1988): Message handling systems: Protocol specifications

> superseded recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q26985506](https://www.wikidata.org/wiki/Q26985506)  
**Source**: https://4ort.xyz/entity/recommendation-x-419-11-1988-message-handling-systems-protocol-specifications