Hello. I want to migrate mails from server based on CPanel to my ISPConfig. Is there an option in ISPConfig or an other solution to prevent redownloading all mails with POP3, I tried with imapsync, simply copy mails from old server to new but everytime my client (Outlook) is downloading again mails. I have instlled the latest ISPConfig 3.2.11.
Dovecot has a built-in feature to migrate POP3 mailboxes without redownloading all the mails. See: https://doc.dovecot.org/settings/plugin/pop3-migration-plugin/
