Litmus Mailer adds an ActionMailer observer to update your Litmus tests each time an email is delivered from development.

Ruby on Rails gem to allow email template views generation straight from localization data

Better logging for rails

Alternative set of LogSubscriber classes for Rails for more structured JSON logs

Creates and emails a simple report for a set of log (or text) files. Useful for aggretating small log files.

Lograge for ActionMailer.

ActionMailer delivery method for Mad Mimi

The notification inbox for your product

Minitest asserts for checking that specific emails were (or were not) sent.

Intercepts and forwards emails.

Permite sincronizar automaticamente seus modelos com o Mailee.me, inclusive com gerenciamento de optin.

gem to patch Rails untill PR 20646 https://github.com/rails/rails/pull/20646 is merged that will enable Mailer Preview to pass params

Compile your mail templates to html/txt files

Mailgun API adapter for Action Mailer

Send mail through multiple vendors

Basic Mailjet ActionMailer support

Braindead-simple email logger for ActionMailer using ActiveRecord

Async mailer without any painful setup

ActionMailer send method for madmimi api

A Mad Mimi delivery method for the Ruby Mail library, with Rails 3 support.