Hi Peter,
i have the same problem, if you remember, i create some mistake on DNS configuration of my domain... i try to edit Dns for problem with email SMTP... and now nothing works, i delete and recreate domain on plesk, clear DNS of domain and try to recreate all but now i can't create ssl...
HI!
First time using plesk at configure it as email server,
i have configured domanin and mail address with the help guide,
i recieve email but not send from the webmail, i try to create a simple php page to try send email but return error.
seems that the host not able to solve the reciever...