Outlook 2007
https://support.microsoft.com/it-it/kb/972148
Outlook 2010
https://support.microsoft.com/en-us/kb/2181579
Per tutte le versioni
http://www.msoutlook.info/question/278
Office365 + immagine nella cartella per dominio
https://docs.microsoft.com/it-it/exchange/troubleshoot/user-and-shared-mailboxes/sent-mail-is-not-saved