I send a message from account A. The receiver gets it but it has been send from account b (see picture where it says, “Sent By”. Before it is account A, after it is account B). If the sender sends a reply it gets send to Account B which is not the account that was selected when sending the message. If the sender replies to all, it gets send to both accounts.
I have never seen anything like it. In my ISP settings there is no forwarding or any other abnormal settings. The accounts in Outlook are both set up correct.
Anybody any ideas? Thanks.