Staff Answer

Jul 26, 2016 - 08:26 AM
We can know only if message was not received by the recepients servers.
In this case you receive a message from MAILER-DAEMON@EXAMPLE.COM that says which message was not delivered and a reason why.
In this case you receive a message from MAILER-DAEMON@EXAMPLE.COM that says which message was not delivered and a reason why.
Source: http://sce.space/