問：This is the mail system at host hkmail.myhost.net. I\’m sorry to have to inform you that your message could notbe delivered to one or more recipients. It\’s attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You candelete your own text from the attached returned message. The mail system <matthias.gebhardt@resch.de>: host mx00.kundenserver.de[127.0.0.1] said: 550-Requested action not taken: mailbox unavailable 550 invalid DNS MX or A/AAAA resource record (in reply to MAIL FROM command)
,郵件地址正確，發郵件退信
答：您好， 550-Requested action not taken: mailbox unavailable 550 invalid DNS MX or A/AAAA resource record (in reply to MAIL FROM command) 這個說的是對方服務器上無法解析出來您的域名的mx 解析。我們給您刷新了下域名解析，建議晚點再重試下。
問：The mail system : host alt1.aspmx.l.google.com[127.0.0.1] said: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient\’s email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser g8si22759oif.355 – gsmtp (in reply to RCPT TO command)
問：您好，又有退信的
答：您好，
這個退信是郵箱地址不存在的。
問：This is the mail system at host hkmail.myhost.net. I\’m sorry to have to inform you that your message could notbe delivered to one or more recipients. It\’s attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You candelete your own text from the attached returned message. The mail system <matthias.gebhardt@resch.de>: host mx00.kundenserver.de[127.0.0.1] said: 550-Requested action not taken: mailbox unavailable 550 invalid DNS MX or A/AAAA resource record (in reply to MAIL FROM command)
答：您好， 550-Requested action not taken: mailbox unavailable 550 invalid DNS MX or A/AAAA resource record (in reply to MAIL FROM command) 這個說的是對方服務器上無法解析出來您的域名的mx 解析。我們給您刷新了下域名解析，建議晚點再重試下。
問：The mail system : host alt1.aspmx.l.google.com[127.0.0.1] said: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient\’s email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser g8si22759oif.355 – gsmtp (in reply to RCPT TO command)
問：您好，又有退信的
答：您好，
這個退信是郵箱地址不存在的。