Mail Delivery System

[betalabs]

καλημέρα καλή χρονιά.Με prestashop 1.6.1.3 Αντιμετωπίζω προβλημα στην αποστολή email.Ενώ έχω ρυθμίσει το email στην δοκιμή που κάνω λαμβάνω μήνυμα "Undelivered Mail Returned to Sender"

This is the mail system at host server.linux11.papaki.gr.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                  The mail system

<[email protected]>: host mta5.am0.yahoodns.net[66.196.118.37] said: 554 5.7.9
    Message not accepted for policy reasons.  See
    https://help.yahoo.com/kb/postmaster/SLN7253.html (in reply to end of DATA
    command)

This is a test message. Your server is now configured to send email.