Extended Simple Mail Transfer Protocol
E947921
Extended Simple Mail Transfer Protocol (ESMTP) is an enhancement of the original SMTP standard that adds support for additional features such as authentication, enhanced status codes, and larger message sizes to improve email transmission capabilities.
Statements (39)
| Predicate | Object |
|---|---|
| instanceOf |
email transfer protocol
ⓘ
network protocol ⓘ |
| abbreviation | ESMTP ⓘ |
| allows |
advertising server capabilities
ⓘ
negotiating supported extensions ⓘ |
| backwardsCompatibleWith | SMTP NERFINISHED ⓘ |
| basedOn | SMTP NERFINISHED ⓘ |
| commandIntroduced | EHLO NERFINISHED ⓘ |
| commandReplaces | HELO ⓘ |
| defaultPort |
25
ⓘ
587 ⓘ |
| definedIn | RFC 1869 NERFINISHED ⓘ |
| enables |
client authentication
ⓘ
internationalization of email addresses ⓘ larger message sizes ⓘ secure transport via STARTTLS ⓘ |
| extends | Simple Mail Transfer Protocol NERFINISHED ⓘ |
| improves | email transmission capabilities ⓘ |
| layer | application layer ⓘ |
| purpose | to extend SMTP with optional capabilities ⓘ |
| standardizedBy | Internet Engineering Task Force NERFINISHED ⓘ |
| status | Internet Standard ⓘ |
| supportsFeature |
8BITMIME
ⓘ
BINARYMIME ⓘ CHUNKING ⓘ DSN ⓘ ETRN NERFINISHED ⓘ PIPELINING ⓘ SIZE extension ⓘ SMTP service extensions ⓘ SMTPUTF8 NERFINISHED ⓘ STARTTLS NERFINISHED ⓘ authentication ⓘ enhanced status codes ⓘ extended SMTP commands ⓘ |
| usedFor |
message delivery
ⓘ
message relay ⓘ message submission ⓘ |
| usesTransportProtocol | TCP NERFINISHED ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.