Gmail shortcuts - Yes, Gmail has shortcuts (C to compose, A to reply) and you can enable them in Settings > General > Keyboard shortcuts.
Schedule emails - Gmail allows users to schedule emails. This means you can schedule birthday emails for your colleagues or manager.
Offline viewing - Gmail can be accessed offline by turning on the "Enable offline mail" option. With this, you can read all existing emails without the Internet.
Unsend emails - Yes, you can unsend emails by increasing the Undo Send's time in Settings by up to 30 secs. This will let you undo emails for up to 30 seconds.
Labels - Gmail lets you label each email so you can organize your messages based on your priority.
Send confidential emails - You can send password-protected emails with an expiry date on Gmail.
Create a vacation reply - You can set up this feature and it will inform people that you are offline, probably on a detox trip.
Activate Priority Inbox - The feature will enable the display of only important emails.
Set custom templates - No need to draft new messages just to say "Thank You" or "Will get back to you." With templates, you can do that with one click.
Snooze emails - Don't want to reply to important emails immediately? You can snooze them to get reminded about them later.
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