SMTP
SMTP (Simple Mail Transfer Protocol) is the internet standard for sending and relaying electronic mail between servers. Defined in the RFC series and in wide use since the early 1980s, it remains the backbone protocol for email transmission across the internet.
Also known as Simple Mail Transfer Protocol, smtp.
Providers that carry SMTP 20
These providers' own APIs.json profiles carry SMTP as a tag — the provider's statement that the standard is part of what it does. APIs.io has not verified the implementation on this page; the de facto profiles on this site are where that measurement exists. Ordered by Kin Score.
Reading
Read from the API Evangelist standards directory. Provider links come from the catalog's own identity tags and are rebuilt nightly. If this page is wrong about a standard or a provider, say so.