# greylisting

> method of defending e-mail users against spam

**Wikidata**: [Q1224892](https://www.wikidata.org/wiki/Q1224892)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Greylisting_(email))  
**Source**: https://4ort.xyz/entity/greylisting


## References

1. Freebase Data Dumps. 2013