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 has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • Simple Mail Transfer Protocol's instance of is recorded as computer network protocol[3].
  • Simple Mail Transfer Protocol's instance of is recorded as text-based protocol[4].
  • Simple Mail Transfer Protocol's Commons category is recorded as Simple Mail Transfer Protocol[5].
  • 1982 marks the founding of Simple Mail Transfer Protocol[6].
  • Simple Mail Transfer Protocol's topic's main category is recorded as Category:Simple Mail Transfer Protocol[7].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 2821: Simple Mail Transfer Protocol[8].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 821: Simple Mail Transfer Protocol[9].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 5321: Simple Mail Transfer Protocol[10].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1047: Duplicate messages and SMTP[11].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1425: SMTP Service Extensions[12].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1651: SMTP Service Extensions[13].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1869: SMTP Service Extensions[14].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1426: SMTP Service Extension for 8bit-MIMEtransport[15].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1427: SMTP Service Extension for Message Size Declaration[16].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1652: SMTP Service Extension for 8bit-MIMEtransport[17].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1653: SMTP Service Extension for Message Size Declaration[18].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1870: SMTP Service Extension for Message Size Declaration[19].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 6152: SMTP Service Extension for 8-bit MIME Transport[20].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1830: SMTP Service Extensions for Transmission of Large and Binary MIME Messages[21].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 3030: SMTP Service Extensions for Transmission of Large and Binary MIME Messages[22].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1845: SMTP Service Extension for Checkpoint/Restart[23].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1846: SMTP 521 Reply Code[24].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1854: SMTP Service Extension for Command Pipelining[25].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 1891: SMTP Service Extension for Delivery Status Notifications[26].
  • Simple Mail Transfer Protocol's described by source is recorded as RFC 7504: SMTP 521 and 556 Reply Codes[27].

Why It Matters

Simple Mail Transfer Protocol has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[2] It is known by 52 alternative names across languages and contexts.[28]

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] . nordsecurity.com. nordsecurity.com. Provenance: wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . 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] . Wikidata sitelinks. wikidata.org.
  2. [28] . 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:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 1d ago · Lillie Morgan · 2026-08-18 view diff on Wikidata ↗
    Mozilla developer network article Glossary/SMTP
    "/* wbsetclaim-create:2||1 */ [[Property:P8205]]: Glossary/SMTP"
  2. 5w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    Topic's main category Category:Simple Mail Transfer Protocol
    Inception
    Port {'amount': '+25'}, {'amount': '+25'}
    Osi model layer location application layer
    + 6 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.