<match value="X-Notes-Item:" type="string" offset="0">
        <match value="Message-ID:" type="string" offset="0:8192"/>
      </match>
      <!-- match X- DKIM- ARC- at start of file and then require at least one
           of the usual: from, received, date...but look farther into the file
           because of the X|DKIM|ARC headers-->
      <match value="(X|DKIM|ARC)-" type="regex" offset="0">