%/email-for-growth-teams providers ↗
← all frameworks
framework · rails

How to Send Emails in Ruby on Rails (2026)

Action Mailer is the canonical interface. Providers with a maintained Action Mailer adapter beat raw SDK use.

Sidekiq is the default for async sends. Webhook handling is straightforward with engine-style mounts.

patterns

Send patterns

  • Action Mailer with a provider gem.
  • Sidekiq retries on transient send failures.
  • Action Mailbox for inbound parsing.
  • Webhook controllers mounted under /webhooks.
pitfalls

Common mistakes

  • Forgetting to use deliver_later in production.
  • Adapter mismatch between dev (letter_opener) and prod.
  • Inbound webhook signature checks skipped behind Action Mailbox.

provider picks for Ruby on Rails

  1. 01

    Postmark

    Transactional

    Best-in-class Action Mailer adapter and webhook helpers.

    100/mo developer plan · $15/mo for 10,000 emails
  2. 02

    SendGrid

    Transactional Marketing

    Mature gem and docs.

    60-day free trial only (permanent free tier was removed May 2025) · $19.95/mo for 50,000 emails
  3. 03

    Mailgun

    Transactional

    Action Mailer adapter and queue-friendly.

    100/day permanent free plan · $15/mo for 10,000 emails (Basic)
  4. 04

    Amazon SES

    Transactional

    aws-sdk-rails Action Mailer integration.

    Up to $200 in AWS Free Tier credits for new accounts · $0.10 per 1,000 emails
Want a language-level SDK comparison instead? See the SDK hub.

reading this as growth and lifecycle teams

Growth work lives or dies on targeting and measurement. What matters is whether behavioral triggers can be built without engineering time, whether the event stream supports attribution past the open, and whether deliverability holds when broadcast volume shares a reputation with product email.

Applied to how to send emails in ruby on rails (2026), that means weighing scheduling, event stream, deliverability, and operating track record ahead of the rest, against behavior-triggered journeys, broadcasts, and winback campaigns measured on revenue.