Spree Mail extends Spree by adding a mailing list subscriber model, sign up forms and an admin to send messages.

MailCatcher REST API SDK

Ease Mailman integration with Rails

Adds SendGrid X-SMTPAPI header support to Mail

The Mail class represents an internet mail message (as per RFC822, RFC2822) with headers and a body

Ability to validate e-mails using the Mailgun API with a REGEX fallback.

mailchimp3 is a gem for working with MailChimp's RESTful JSON API documented at http://kb.mailchimp.com/api/ using HTTP basic auth or OAuth 2.0. This library can talk to any endpoint the API provides, since it is written to build endpoint URLs dynamically using method_missing.

Extends Mail to provide a mechanism for converting external image sources to embedded attachments.

Save fields from mailer forms to the database.

This rails plugin provides a simple page giving the ability to add, edit and remove Mailgun mailing lists.

Template Mailer is a library that can be used to send emails that are created from templates. It makes use of the Tilt library to support a wide variety of templating systems and the Pony library for integration with mail servers.

Basic Mailjet ActionMailer support

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

Send mails through Maileva FTP deposit

Marketing Mailchimp REST API with no dependencies.

MailParser is a parser for mail message

An ActionMailer delivery method using the MailerSend Ruby SDK to send emails with their API

A simple queue API with a maildir backend. Also includes an HTTP API

The official Ruby library for Mailflow's API

Sync user emails with MailChimp mailing lists