How to: Email Utilities
- [Airmail](http://airmailapp.com/) - Lightning fast email client designed for El Capitan.
- [MailMate](https://freron.com/) - Advanced IMAP email client, featuring extensive keyboard control and Markdown support.
- [Mailplane](https://mailplaneapp.com/) - A tightly integreted client for Google Mail, Inbox, Calender, and Contacts.