相关疑难解决方法(0)

我正在解析一个邮箱文件，该文件存储未成功传送的电子邮件的电子邮件服务器报告。我希望提取错误的电子邮件地址，以便将它们从系统中删除。日志文件如下所示：

...some content...
                   The mail system

<slavicatomic118@hotmail.com>: host mx1.hotmail.com[65.54.188.94] said: 550
    Requested action not taken: mailbox unavailable (in reply to RCPT TO
    command)

...some content...
                   The mail system

<oki88@optimumpro.net>: host viking.optimumpro.net[79.101.51.82] said: 550
    Unknown user (in reply to RCPT TO command)

...some content...
                   The mail system

<sigirna_luka@yahoo.com>: host mta5.am0.yahoodns.net[74.6.140.64] said: 554
    delivery error: dd This user doesn't have a yahoo.com account
    (sigirna_luka@yahoo.com) [0] - mta1172.mail.sk1.yahoo.com (in reply to end
    of DATA command)

...etc.

电子邮件地址位于“邮件系统”一行之后的 2 行。像这样使用 grep 给了我“邮件系统”行和接下来的两行：

grep -A …