The following attachment had content that we can't
prove to be harmless.  To avoid possible automatic
execution, we changed the content headers.
The original header was:

	Content-Type: text/plain; x-avg-checked=avg-ok-339F6D9D; name=PLAN9.INI; x-mac-type=42494E41; x-mac-creator=74747874
	Content-Disposition: attachment; filename="PLAN9.INI"
	Content-Transfer-Encoding: base64