This is an extension to Ruby's net/smtp library that lets you take advantage of PowerMTA's (port25.com) native mailmerge feature.

API-powered email delivery for Ruby apps with support for Postmark, SendGrid, Mailgun and more.

Simple asynchronous emails with Resque

Facteur allows you add a messaging system in your Rails 3. You can create many mailboxes for your users. They will be able to send and receive messages.

EventMachine Mail Agent for SMTP and IMAP

Rumbster is a simple SMTP server that receives email sent from a SMTP client. Received emails are published to observers that have registered with Rumbster. There are currently two observers; FileMailObserver and MailMessageObserver.

Get access to IMAP and STMP via OAuth2, using the standard Ruby Net libraries

Designed to mimic ActionMailer's familiar interface, this gem offers a way to send transactional emails that are rendered by Postmark's Templates feature and delivered via the Postmark API.

Use email for customer communications.

Deliver mail in a resque job

Configure ActionMailer or Mail delivery settings based on either a singular MTA_URL environment variable or common conventions for popular off the shelf SMTP providers.

SimplePostmark makes it easy to send mails via Postmark using Rails's ActionMailer.

Applications that have complex email sending logic have DRYness problems. ActiveMailer solves that by making a legitimate email model where all sending logic belongs. It is also capable of acting as an audit trail for email sending.

A Ruby interface for the wonderful e-mail newsletter application Sendy.

An opinionated rails drip email engine that depends on ActiveRecord and ActionMailer

A Ruby mailing list library designed to be integrated into other applications.

An adapter for using Sendcloud with Rails and Action Mailer

Send RSS feeds as e-mail

Framework for developing applications in the Yahoo! Mail Development Platform.

SimplePostmark makes it easy to send mails via Postmark™ using Rails 3's ActionMailer.