Before migrating an IMAP account, creating a separate local backup is a sensible precaution. Although IMAP synchronizes email data between the server and supported email clients, the extent of locally stored content depends on the application settings. Some clients download messages and attachments on demand rather than keeping everything available offline.

Start by reviewing your mailbox and identifying the folders that need to be preserved. Make sure your email client has finished synchronizing the required messages, including older conversations and archived folders. If the application offers an option to download messages for offline use, check its settings before beginning the backup.You should also keep at least one additional copy of the backup on a separate drive or another secure storage location. This reduces the risk of losing everything if the computer fails or the primary backup becomes corrupted.

If you prefer a more organized process, an Cigati IMAP Backup Tool may be worth considering, provided it supports your email provider, required folders, and preferred export format. Regardless of the method you choose, verifying the exported data before completing the migration is one of the most important steps.