To migrate Zimbra to Gmail without affecting existing Gmail data, you should use an IMAP-based migration method that transfers emails safely without overwriting the current mailbox. Since Zimbra supports IMAP, a migration tool can connect to the account and move emails directly into Gmail while keeping the existing Gmail messages unchanged.
Many users perform this task using the SysInfo IMAP Backup Tool. The process usually starts by logging in to the Zimbra account through IMAP, after which the software loads the mailbox and shows folders in a preview. You can review the data and then choose Gmail as the destination account. During the migration, the tool transfers emails and attachments while preserving the folder hierarchy.
Many users perform this task using the SysInfo IMAP Backup Tool. The process usually starts by logging in to the Zimbra account through IMAP, after which the software loads the mailbox and shows folders in a preview. You can review the data and then choose Gmail as the destination account. During the migration, the tool transfers emails and attachments while preserving the folder hierarchy.