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            - to_addrs     : A list of addresses to send this mail to.  A bare
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            - msg          : The message to send.
            - mail_options : List of ESMTP options (such as 8bitmime) for the
                             mail command.
            - rcpt_options : List of ESMTP options (such as DSN commands) for
                             all the rcpt commands.

        msg may be a string containing characters in the ASCII range, or a byte
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        \r and \n characters are converted to \r\n characters.

        If there has been no previous EHLO or HELO command this session, this
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         SMTPRecipientsRefused  The server rejected ALL recipients
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         SMTPSenderRefused      The server didn't accept the from_addr.
         SMTPDataError          The server replied with an unexpected
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         >>> tolist=["[email protected]","[email protected]","[email protected]","[email protected]"]
         >>> msg = '''\
         ... From: [email protected]
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         { "[email protected]" : ( 550 ,"User unknown" ) }
         >>> s.quit()

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