SMTP Senpai API

API keyHTTPSEmail

Overview

EU-hosted transactional email API and SMTP relay: DKIM on your domain, signed webhooks, delivery events

SMTP Senpai is an email API. Requests are authenticated with an API key. It is served over HTTPS and does not allow direct browser requests (no CORS).

At a glance

Authentication: API key
HTTPS: Yes
CORS: No
Category: Email

Questions

Does the SMTP Senpai API need an API key?

Yes. The SMTP Senpai API uses API key authentication; the documentation explains how to get credentials.

Can I call the SMTP Senpai API from the browser?

Not directly. The SMTP Senpai API does not send CORS headers, so call it from your server or a proxy instead of browser JavaScript.

Does the SMTP Senpai API support HTTPS?

Yes, the SMTP Senpai API is served over HTTPS.

What are alternatives to the SMTP Senpai API?

Other Email APIs include Sendgrid, Sendinblue, mail.tm, Mandrill, Guerrilla Mail.

Compare alternatives →

Sendgrid

A cloud-based SMTP provider that allows you to send emails without having to maintain email servers

API key334 endpoints

Sendinblue

A service that provides solutions relating to marketing and/or transactional email and/or SMS

API keyCORS

mail.tm

Temporary Email Service

No authCORS

Mandrill

Mandrill is a reliable, scalable, and secure delivery API for transactional emails from websites and applications. It's ideal for sending data-driven transactional emails, including targeted e-commerce and personalized one-to-one messages.

No auth90 endpoints

Guerrilla Mail

Disposable temporary Email addresses

No auth

Postmark Account-level API

Postmark makes sending and receiving email incredibly easy. The Account-level API allows users to configure all Servers, Domains, and Sender Signatures associated with an Account.

No auth23 endpoints

Listed from public-apis database (MIT).