Carbonio CE 25.9 Sender address rejected: not owned by user

Hi all,

i've a fresh installation of carbonio CE 25.9 with two domains managed.

With the first domain the send/receive email it works perfectly from client (outlook) and webmail. Instead, the second domain i receive/send email from webmail but only receive the mail with client mail (outlook). When i try to send an email from client outlook i receive this error: 

<wordpress@casadiriposodivinoamore.it>: Sender address rejected: not owned by user wordpress@casadiriposodivinoamore.it”.