Due to the security settings of each carrier, It is recognized as reception refusal, or if you are setting spam mail, the e-mail may not deliverd correctly. Please set to receive settings the following domains.
Depending on the settings of your e-mail service, e-mail software, antivirus software etc., it may be recognized as "Spam mail" and the e-mail may not arrive. (Especially those using free e-mail such as Yahoo mail and Hotmail)
Please check "Spam folder" etc. or please check the service and software settings you are using.