receiving multible same e-mails

receiving multible same e-mails

After setting up my e-mails in my domain. I sent out test e-mails to existing e-mail accounts and they were good.
However, when I receive new e-mails from different e-mail accounts I receive multiple e-mails of the same e-mail, some times up to 24 of such.
Appreciate your response.
Thanks,
Bee