How can I preserve email folder hierarchy during IMAP migration?

To preserve email folder hierarchy during IMAP migration, use a migration tool with folder mapping and structure-preservation features. SysInfo IMAP Backup Tool lets users preview the mailbox folder tree before migration and map source folders to the required destination locations. It preserves the existing folder hierarchy along with emails, attachments, timestamps, read/unread status, and standard mailbox metadata. This helps keep folders such as Inbox, Sent, Drafts, Trash, and custom folders organized after migration. The tool also supports incremental migration, allowing newly added emails to be transferred without unnecessarily repeating previously migrated data. For large or multiple mailboxes, batch migration through CSV can simplify the process while maintaining the mapped folder structure.