django-anymail

Django email backends and webhooks for Amazon SES, Brevo, MailerSend, Mailgun, Mailjet, Mailtrap, Postmark, Postal, Resend, Scaleway TEM, SendGrid, SparkPost, Unisender Go and more. Maintained by anymail on GitHub, where it has earned 1,895 stars from the community.

It's actively developed around django, email, mailgun, and is a solid reference for anyone building with these tools.