Enable users to block disposal email, detect free email and validate if an email is valid

Enables User models in Rails 3.1+ apps to have simple private messaging capabilites between them.

mail2frontmatter plugin for middleman-automatic-clowncar

A small, but powerful tag-based template language for Ruby modeled after the ones used in MovableType and TextPattern. It has tags similar to XML, but can be used to generate any form of plain text (HTML, e-mail, etc...) adapted to work on Ruby 1.9.

A custom Active Record validator that helps you prevent users from signing up for multi-tenant style systems with reserved subdomains like www, ftp, mail, stmp, etc.

A Rails plugin gem to intercept emails in development and preview them in RailsMailPreview to get an idea of what it will look like when it's sent in production.

This can be used by rake task as a simple report generation tool.

Currently stores received mail in MongoDB

Uses the Temp Mail API to create a temporary email address.

Ruby binding and command-line interface for Apple's Mail.app

Check if email box is valid

Intelligently handles HTML input, and is meant to safely handle untrusted templates and substitution variables. Basically, it's designed for mail merge.

It's a gem

Easily allowlist email addresses in your Rails app.