550 unknown user (in reply to RCPT TO command).

550 unknown user (in reply to RCPT TO command). (in reply to RCPT TO command). 550 the rcpt account is invalid (in reply to RCPT TO command smtp error ,rcpt to:550 unknown huangjianqiang1986@163.cm SMTP error,RCPT TO:550 Domain does 请问英语高手in reply to和reply to 求救To run a command as administrator (user "root"), use "sudo to have nothing to say in reply in reply to 与 in response reply to和reply in的用法和区别,急 In reply to 的中文意思 A Letter in Reply to a Friend