Email migration is a process in which a large number of email messages are transferred from one email account to another email account. In general, email migration is required when you are switching email accounts.
Gsuite Migration
Migrate your organization’s data (IMAP) to Google Workspace
IMAP migration tool supports migrating from a variety of IMAP enabled email servers, including Gmail, G Suite, Office 365, Zoho, Zimbra, Icewarp, cPanel etc