I have a situation where a user deleted emails using iphone, then, wants he sees messages are gone from desktop client, wants them recovered from server, happened several times now

is there a way to have all deletes to go to server trash for potential recovery ? off topic: is there a way on iphone to force deletions to server's trash

is there a way to have dovecot duplicate all emails to say user_backup@dom.tld mail box ?

or should I duplicate emails in postfix ?

using dovecot 2 with lmpt and virtual domains

thanks

Voytek