# Simple Mail Transfer Protocol

> Internet protocol used for relaying e-mails

**Wikidata**: [Q160453](https://www.wikidata.org/wiki/Q160453)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol)  
**Source**: https://4ort.xyz/entity/simple-mail-transfer-protocol


## References

1. [Source](https://nordsecurity.com/blog/history-of-email)
2. Freebase Data Dumps. 2013
3. [Internet Assigned Numbers Authority](http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=smtp)
4. BabelNet
5. Quora
6. Service Name and Transport Protocol Port Number Registry
7. KBpedia