Diagnostic-Code: SMTP; 552 5.1.1 <info@testunity.com> Mailbox delivery failure policy error

Diagnostic-Code: SMTP; 552 5.1.1 <info@testunity.com> Mailbox delivery failure policy error

Hello,

Our website is hosted on AWS and we have configured it to send mail. Till yesterday it had been working fine. Since today morning, we have been facing this issue. None of our mails are reachable at info@testunity.com.

Please do the needful.

Regards,
Aditya