A feature called "sync" allows downloading emails locally on a per-folder basis. That will allow accessing them while offline, keep them always up to date, provide faster search, show unread email count and show push notifications as soon as new messages in those folders pop up.
Color coding allows for users to set up custom visual ques as to what the notification is for, which makes for a convenient way to glance at ones device to know if the e-mail is something they want to open.
The app will automatically attempt to figure out which emails are important to you and surface those. The priority emails will show up in your inbox in a tab called Focused, with other emails in a tab called Other. It aims to separate spam and promotional emails from the important emails.
Microsoft Outlook comes with built-in cloud storage browser allowing you to attach files directly from services such as Dropbox, Box, Google Drive or OneDrive to emails and directly open attached files without the need for the main cloud storage app.
The app stores user information and credentials on outside servers which is a violation of ActiveSync password requirement policies. These security concerns have been enough of an issue that European Parliament has banned its members from using the app out of fear that it might lead to leaking sen...
As the app uses a third party server to connect to the exchange server, the exchange server must be publically available in the internet and the login in the app will just fail without an error message when the exchange server is behind a firewall (e.g. VPN or for internal test setups).
Gmail brings much of the functionality and power of Google's search engine to the app's search. You can use operators such as label:, is:, OR, has: among others, define date ranges, limit search to specific groups and so on. And, you can do it all amazingly fast. The search will also try to
Aggregates your email from all of your different email providers. Allows reading and managing your Exchange, Gmail, iCloud, etc emails all in one place. There's support for both unified inboxes and separate inboxes for each account.
Type Mail has clearly put effort in to make their interface easy on the eyes by following Material Design style guidelines and easy to overview by color-coding messages and including details such as service logos and sender's profile to quickly understand where the message is coming from.
Tasker is an automation app. Aqua Mail's Tasker integration allows changing settings, triggering message based events and running mail checks based on criteria like time of day, location, timer, connection type, etc.