在我收到相同的7封退信(一天一封) 之后
同样的错误地址我只发了一封信
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Hello,
Thank you for your message.
If a message you send is not immediately delivered to the recipient, Gmail
tries to send that message for up to 7 days. Messages may be delayed from
reaching a recipient's mailbox for a number of reasons. Delayed messages
are most commonly a result of large amounts of incoming email to the
recipient's server, or configuration and domain errors. At this time,
there is no way to automatically cancel delivery once a Gmail message has
been sent.
We hope you enjoy Google's approach to email.
Sincerely,
The Gmail Team