With full-fledged Email, Calendar and Contacts packed into one single app, Zoho Mail is the suite-st email app around.

Top Features:

Multiple account support - Add and switch between your different Zoho email accounts. Or view it all in one go through the unified Inbox with push notifications.

Conversation view - Easily keep up with long email threads with related messages bunched together.

Optimized for Tablets - Zoho Mail is fully optimized for Android Tablets of various form factors.

Quick swipe actions - Instantly archive or delete emails with customizable swipe actions.

Advanced search - Dig into your inbox in seconds with auto-suggestions and handy filter options.

Work Offline - Compose and send emails even when offline. Emails will be sent as and when internet connection becomes available.

Integrated Calendar - View / schedule your appointments and accept invites from within your email.

Contacts on the go - Filter emails from your contacts or keep in touch with them through Email or a Call.

Streams - Where you can Collaborate, Socialize and Integrate. Have productive conversations without the clutter of long emails, thus changing the way you communicate; within and between teams.
From version Zoho Mail - Email and Calendar 2.4.3:
-You can now get to know how secure your emails are and the level of encryption as well.

-You can quickly search for information related to your contacts across all Zoho services via Zoho Search.

-We've brought in support for the Edit as new feature in this update.

-We've provided settings to configure the next course of action when mails are deleted, archived or marked as spam.

-Also, we've taken down a few bugs in this update
All versions