Simple Mail Transfer Protocol

Internet protocol used for relaying e-mails
CreativeWork computer_network_protocol Q160453
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Simple Mail Transfer Protocol

Summary

Simple Mail Transfer Protocol is a computer network protocol[1]. It ranks in the top 5% of computer_network_protocol entities by monthly Wikipedia readership (557 views/month).[2]

Key Facts

  • Simple Mail Transfer Protocol's image is recorded as SMTP-transfer-model.svg[3].
  • Simple Mail Transfer Protocol's instance of is recorded as computer network protocol[4].
  • Simple Mail Transfer Protocol's instance of is recorded as text-based protocol[5].
  • Simple Mail Transfer Protocol's Commons category is recorded as Simple Mail Transfer Protocol[6].
  • +1982-00-00T00:00:00Z marks the founding of Simple Mail Transfer Protocol[7].
  • Simple Mail Transfer Protocol's Freebase ID is recorded as /m/06wsp[8].
  • Simple Mail Transfer Protocol's topic's main category is recorded as Category:Simple Mail Transfer Protocol[9].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 2821: Simple Mail Transfer Protocol[10].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 821: Simple Mail Transfer Protocol[11].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 5321: Simple Mail Transfer Protocol[12].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1047: Duplicate messages and SMTP[13].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1425: SMTP Service Extensions[14].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1651: SMTP Service Extensions[15].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1869: SMTP Service Extensions[16].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1426: SMTP Service Extension for 8bit-MIMEtransport[17].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1427: SMTP Service Extension for Message Size Declaration[18].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1652: SMTP Service Extension for 8bit-MIMEtransport[19].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1653: SMTP Service Extension for Message Size Declaration[20].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1870: SMTP Service Extension for Message Size Declaration[21].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 6152: SMTP Service Extension for 8-bit MIME Transport[22].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1830: SMTP Service Extensions for Transmission of Large and Binary MIME Messages[23].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 3030: SMTP Service Extensions for Transmission of Large and Binary MIME Messages[24].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1845: SMTP Service Extension for Checkpoint/Restart[25].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1846: SMTP 521 Reply Code[26].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1854: SMTP Service Extension for Command Pipelining[27].

Why It Matters

Simple Mail Transfer Protocol ranks in the top 5% of computer_network_protocol entities by monthly Wikipedia readership (557 views/month).[2] It has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[28] It is known by 52 alternative names across languages and contexts.[29]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . nordsecurity.com. nordsecurity.com. Provenance: wikidata.org.
  6. [8] . Freebase Data Dumps. wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . wikidata.org.
  14. [16] . wikidata.org.
  15. [17] . wikidata.org.
  16. [18] . wikidata.org.
  17. [19] . wikidata.org.
  18. [20] . wikidata.org.
  19. [21] . wikidata.org.
  20. [22] . wikidata.org.
  21. [23] . wikidata.org.
  22. [24] . wikidata.org.
  23. [25] . wikidata.org.
  24. [26] . wikidata.org.
  25. [27] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [28] . Wikidata sitelinks. wikidata.org.
  3. [29] . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Simple Mail Transfer Protocol. Retrieved May 3, 2026, from https://4ort.xyz/entity/simple-mail-transfer-protocol
MLA “Simple Mail Transfer Protocol.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/simple-mail-transfer-protocol.
BibTeX @misc{4ortxyz_simple-mail-transfer-protocol_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Simple Mail Transfer Protocol}}, year = {2026}, url = {https://4ort.xyz/entity/simple-mail-transfer-protocol}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Simple Mail Transfer Protocol — https://4ort.xyz/entity/simple-mail-transfer-protocol (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/simple-mail-transfer-protocol · Last refreshed: