# RFC 8689: SMTP Require TLS Option

> request for comments publication

**Wikidata**: [Q77250613](https://www.wikidata.org/wiki/Q77250613)  
**Source**: https://4ort.xyz/entity/rfc-8689-smtp-require-tls-option


## References

1. RFC Index
2. DBLP Dataset 2021-01-02