# RFC 6647: Email Greylisting: An Applicability Statement for SMTP

> request for comments publication

**Wikidata**: [Q47459840](https://www.wikidata.org/wiki/Q47459840)  
**Source**: https://4ort.xyz/entity/rfc-6647-email-greylisting-an-applicability-statement-for-smtp


## References

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