What are some of the challenges faced while backing up emails?

One of the main challenges with most email backup solutions is that they are periodic, not continuous like Vaultastic. This means that any email activity—such as sending, receiving, or deleting—occurring between backup runs might be missed, leaving gaps in your data protection. 

This discontinuous nature of backups reduces confidence that all emails are securely backed up. Additionally, many backup solutions rely heavily on IT teams for data recovery, overburdening administrators with recovery requests and reducing overall efficiency.