I want to get rid of POP3 to prevent mails being moved from the server to the computer with a client like Outlook/Thunderbird (the default behavior of this protocol). However, some "power users" want to keep the import feature in Gmail, which is POP3 only. Is it possible to set Dovecot in order to block the "deletion" ? I know that it's possible to do it by setting the clients but they're too heterogenous, I want to do it in the server side only.
Thanks.