How to Send Email in Dart / Flutter (SMTP & API)

Here is how to send email in Dart / Flutter so it reaches the inbox.

Your options in Dart / Flutter

Use an HTTP call to an email API from your backend (never send SMTP from the app).

Make it land

• Authenticate your domain (SPF, DKIM, DMARC).
• Send from a dedicated, warmed IP.
• Handle bounces and complaints via webhooks.

How Rainmail helps

Rainmail sends from your own domain on a dedicated, isolated IP with SPF, DKIM, DMARC, reverse-DNS and managed warm-up handled for you, a REST API, and an AI watching deliverability — and it welcomes senders SES, SendGrid and Mailchimp reject, from $8. Run the free checker or see plans.