INVALID_MSGID: Message-Id is not valid, according to RFC 2822

  • This is still not fixed, Message-Id email header is missing angle brackets, and thus messages are scoring worse in SpamAssassin test:

    Message-ID: [email protected] is not valid Message-ID.

    Message-ID: <[email protected]> is valid Message-ID.

    Just change PostmanWpMail.php on the line #68 to
    $headers[] = 'Message-ID: <' . $this->createMessageId() . '>';

    I can do this myself and send you a merge request, just let me know where your Git repo is.

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