<item>! -- refers to your <ref id="spoolfile" name="$spoolfile"> (incoming) mailbox
<item>> -- refers to your <ref id="mbox" name="$mbox"> file
<item>< -- refers to your <ref id="record" name="$record"> file
<item>! -- refers to your <ref id="spoolfile" name="$spoolfile"> (incoming) mailbox
<item>> -- refers to your <ref id="mbox" name="$mbox"> file
<item>< -- refers to your <ref id="record" name="$record"> file