ExpressMailer is intended to be a quick and easy way to send yourself or your team members nice looking emails about things that happen in your rails application. No need for creating a new Mailer, copy views, wade through email HTML, or any of that. Just tell ExpressMailer a few things about wha...

Is an Action Mailer adapter for using SendGrid in a Rails application

A Ruby gem for interacting with the MailUp REST API.

Inspired by the now slightly out of date devise_mailchimp this gem works in a similar fashion but with a focus on multi-vendor support, rather than exclusively MailChimp.

With this gem you will be able to enqueue your emails on your Resque workers to avoid making your user wait for the email to be send when he causes an email sending action in your application. Using resque_action_mailer_backend makes email sending a breeze as you w...

This provides Ruby access to (eventually) all of Mailchimp's APIs

Mailgun integration for rails

The Mailit library, by Kevin Berry

A simple gem to interact with Mailchimp through their API v3

Easily add Mailgun Webhook integration to your Rails or Rack application.

Merb plugin that provides mailer functionality to Merb

allow you to integrate your mail into todoist.(required IMAP.)

Official Mailclerk ruby gem

Torg Mail API client written in Ruby

loose_mail

Mail client of the Union Station system.

Mongoid based replacement Mailhopper::Email model

Allows multiple attachments for mailboxer messsages and replies

This plugin adds some extensions to the Roda mailer plugin, specifically the ability to log outgoing emails, or to prevent actual delivery.

Incoming mail processing daemon for Exchange Web Services (EWS). This is the Ruby Gem that does fetching, parsing and watching the exchange mail box for further processing.