Email Sanitizer lets you avoid accidentally sending out emails to your customers from staging, demo or other non-production environments

Expressive email assertions that let you succinctly describe when emails should and should not be sent

EmailTestHelpers are a collection of lightweight helpers designed for acceptance tests. They add ability to find emails and click links in them.

Asynchronous mail client and server written in ruby, eventmachine to replace synchronous mail implementation in Rails 2 and 3

An easy smtp eventmachine wrapper for activemailer.

Enhanced Rails is a framework for building web-application template and javascript agnostic on top of either MySQL, PostgreSQL, SQLite, DB2, SQL Server, or Oracle with eRuby- or Builder-based templates.

Exception notification for Rails apps(+ More Info!)

Exchange journalling wraps emails as a MIME attachment of a journal message. This extracts the original message our of a journal message

Using Action Mailer, gem sends all tasks from Fat Free CRM to your Wunderlist account.

Use this plugin in your rails applications to send emails through the Postmark API

Send ActionMailer messages with the Flowmailer API

Braindead-simple email logger for ActionMailer using ActiveRecord

Gmail markup in rails

Development tools that aim to make it simple to visualize mail sent by your Rails app directly through your Rails app.

New Era Notifier

The bare bones necessary for Harpiya.

Adds the commonly required behaviour of caching web accessible versions of HTML emails to ActionMailer

holy_cow "I can't believe it's this easy to get notification about what's happening in my app."

Daemon for sending out messages/emails via a RESTful API.

Console tool which generates html/eml stuff for your newsletters from html-files (support images in separate files)