SMTP Service

Start integrating with third-party services and sending emails via SMTP.

Jonni LundyJonni Lundy

How to use SMTP

When configuring your SMTP integration, you’ll need to use the following credentials:

  • Host:
  • Port: 465
  • Username: resend
  • Password: YOUR_API_KEY

Replace YOUR_API_KEY with an existing key or create a new API Key.

Understand SMTP ports

Ports help to instruct the type of security you want to use in your SMTP connection.

  • For a SSL connection, use port 465 or 2465.
  • For an unencrypted or a TLS connection, use port 25, 587, or 2587.

If you don't know which port to use, we recommend using 465.

Explore SMTP integrations

One of the most common ways to use SMTP is to integrate with a third-party service.

Here are some integrations we documented for you:

Start sending via SMTP

Go to SMTP configuration page to start sending emails via SMTP.

SMTP on the Dashboard
SMTP on the Dashboard

Check the documentation to learn more about SMTP.