How to Send Email in Ruby on Rails (SMTP & API)

Here is how to send email in Ruby on Rails so it actually reaches the inbox.

Your options in Ruby on Rails

Configure ActionMailer with SMTP settings or an API adapter and send from mailer classes. (ActionMailer over SMTP or an API delivery method.)

Make it land, not bounce

• Authenticate your domain with SPF, DKIM and 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, plus 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.