Mailgun

API

Email API and SMTP service for sending, receiving and validating email

Price: Free tier, then paid
Access: API key

About

Email service from Sinch for sending, inbound routing and address validation over a REST API or SMTP. Sending domains live in a US or an EU region, and message data stays in its region. The free plan sends 100 emails a day.

What you can do with it

Send transactional and batch email through the REST API or SMTP
Route inbound email to your app as a parsed HTTP POST
Validate email addresses before you send to them

Get started

Create an API key
Add and verify a sending domain (or use the sandbox domain)

Example

curl --user "api:$MAILGUN_API_KEY" \
  "https://api.mailgun.net/v3/$MAILGUN_DOMAIN/messages" \
  -F from="Test <postmaster@$MAILGUN_DOMAIN>" \
  -F to='your-email@example.com' \
  -F subject='Hello!' \
  -F text='Test message'

Details

Hosting: Hosted service
Available in: Worldwide
Official SDKs: Go, JavaScript/TypeScript, PHP, Java, Ruby, Python
MCP server: Local