3rd party dependency-free solution how to monitor performance of your Rails applications.

[Rails] The Exception Notifier plugin provides a mailer object and a default set oftemplates for sending email notifications when errors occur in a Railsapplication.

Test your ActionMailer and Mailer messages in Capybara

Rails plugin for sending asynchronous email with ActionMailer and Resque.

The Postmark Rails Gem is a drop-in plug-in for ActionMailer to send emails via Postmark, an email delivery service for web apps.

Rails performance tests (removed from core in Rails 4.0)

Rails plugin for sending asynchronous email with ActionMailer and Resque

Rails plugin for sending asynchronous email with ActionMailer and Resque

Rails observer (removed from core in Rails 4.0)

Gem to extend ActionMailer with SendGrid API support

[description]

Best practice is to send text/plain && text/html markdown works great for both, so why write your templates twices?

An adapter for using Mailgun with Rails and Action Mailer

Ruby wrapper for Mailjet's v3 API

Easy SQL based report generation with the ability to accept request parameters and render multiple formats.

Mail safe provides a safety net while you're developing an application that uses ActionMailer. It keeps emails from escaping into the wild. Once you've installed and configured this gem, you can rest assure that your app won't send emails to external email addresses. Instead, emails that would normally be delivered to external addresses will be sent to an address of your choosing, and the body of the email will be appended with a note stating where the email was originally intended to go.

Test an application's email abilities without ever sending a message to actual live addresses

Making HTML emails a little less painful. Writes css inline and corrects image urls.

A delivery method to send your notifications via email using ActionMailer.

Implement texter classes for sending SMS messages in similar way to how e-mails are sent with ActionMailer-based mailers. Take advantage of e-mail proxying and enhanced phone number parsing, among others.