這種訊息? 會不會被微軟列入黑名單了?
452 4.5.3 Too many recipients (AS780090) [BO1IND01FT003.eop-IND01.prod.protection.outlook.com] (in reply to RCPT TO command)
host proconnect-co-in.mail.protection.outlook.com[23.103.140.170] said: 451 4.7.500 Server busy. Please try again later from [223.31.145.7]. (AS77713180) [BO1IND01FT003.eop-IND01.prod.protection.outlook.com] (in reply to end of DATA command)