Zimbra Desktop Alternatives

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Mailbird is the best email client for Windows 7, 8 and 10

An API to convert HTML/CSS documents to PDFs and images. cloudlayer.io is the most affordable, reliable, and fastest way to convert with high fidelity.

Visit Website     freemium $1.0 / Monthly (Monthly Plus Usage)

eM Client is a Windows-based email client for sending and receiving emails, and managing calendars, contacts and tasks.

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Airmail is a lightweight and lightning fast mail client for Mac.

multi-channel inbox service for collaborative teams

The Power Email App for busy professionals, like you.

Spike is a content marketing platform that drives content recommendations to your target audience, helping to amplify your message and connect with customers.

Mailspring is a mail client for Mac, Windows and Linux.

Apps/Evolution - GNOME Wiki!

Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps

freemium

Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).

K-9 is an opensource email client making it easy to chew through large volumes of email.