NOQUEUE: reject: RCPT from unknown[40.92.65.62]: 450 4.1.8 example@hotmail.com: Sender address rejected: Domain not found; from=example@hotmail.com to=name@example.com proto=ESMTP helo=<EUR01-HE1-obe.outbound.protection.outlook.com>
How can this be resolved? I only have this issue with outlook/hotmail mails.