Sync in email means that it will compare all the folders in your email client/app with all the folders on email servers and see whether it needs to import, delete, or move messages to other folders, and whether or not it needs to add or delete and folders you've created.

What does it mean to sync your email?

Sync or data synchronization is the process of backing up the data from a device or local storage, be it emails, photos, videos, or even calendar events. ... At the same time, sync also means that emails stored in the cloud server of an email service provider are available in the device for offline use.

Should I turn sync on or off?

If you are using Enpass on multiple devices, then we recommend enabling sync to keep your database updated across all your devices. ... Also, you don't need to worry about the safety of your database as using sync is safe. Your cloud always contains a copy of the same encrypted data as on your device.