Hello, Raf. As far as I can see, you can configure allow list for the SMTP addresses you are sending from. If that doesn't help, I would recommend reaching out to the external email provider and ask them to clarify why the IP address is greylisted. Apart from changing the IP address, I can't think of what else you can do from Plesk's side.
Hello, Raf. As far as I can see, you can configure allow list for the SMTP addresses you are sending from. If that doesn't help, I would recommend reaching out to the external email provider and ask them to clarify why the IP address is greylisted. Apart from changing the IP address, I can't think of what else you can do from Plesk's side.