Alternatives toPostbox

Enjoy safe, fast and easy email, Mozilla-style. The Thunderbird email client includes intelligent spam filters, powerful search and customizable views.

Web-browser, advanced e-mail and newsgroup client, IRC chat client, and HTML editing made simple.

Mailbird is an email client for Windows, that provides all the right features and tools to help you reach inbox zero faster. It has features such as the first Email Speed Reader, Quick Compose, Productivity Apps and more.

All your email in one place.

Internet Mail is the software specifically designed for the Internet e-mail.

Manage multiple email accounts, calendars, and your contacts, even when you're offline.

Opera Mail is a lightweight, customizable mail client. Reading, labeling, and filtering messages has never been so easy.