Hello,
Mailwizz administration is on server 1, I am using server 2 to send emails.
In the header of e-mails received, the domain of server 1 appears in addition to server 2. Example:
Received: from server2 (server2 [server2ip])
(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128...