550 5.2.1 user disabled
My mail address "***********@icloud.com" can't receive new mail and returns the error:
550 5.2.1 user disabled; cannot receive new mail:***********@icloud.com
＊ 個人情報を削除いたしました。Apple Inc.
Generally, a mail server limit receiving mails in a period. If you receive too many mails in a period, you encounter the error and cannot receive any mail.
But after appropriate time, you will receive mails again.