email outgoing mail error

email outgoing mail error


One of the mail user( claims@krupamyihospitals.in) outgoing mail is disabled. When I see the user in control panel, I see Outgoing disabled in red. When I try and enable it, I get the error message please revert

error code : 554 5.1.8 sender address blocked 

Regards

Amol Karmalkar
admin@krupamayihospitals.in