There is still something wrong with the message you pasted, and possibly
with how you are runing it into SA to test:
Received: from n6c.bullet.mail.tp2.yahoo.com (n6c.bullet.mail.tp2.yahoo.com
[203.188.202.136])
\x09by esmtp.ky.webtent.net (WebTent ESMTP Postfix Internet Mail Gateway)
with SMTP id 2348137B72A
Notice that that second line starts with " \x09by". This is a text string
that won't be recognized as a tab followed by "by", which was apparently
what was in the original message before something helpfully changed the tab
character to a hex representation.
Pull those \x09's out of the message, replacing them with tabs or spaces,
and things should at least recognize the received headers correctly.
0.0 MISSING_MID Missing Message-Id: header
0.0 MISSING_DATE Missing Date: header
2.5 MISSING_HB_SEP Missing blank line between message header and
body
1.3 MISSING_HEADERS Missing To: header
1.8 MISSING_SUBJECT Missing Subject: header
1.4 EMPTY_MESSAGE Message appears to have no textual parts and no
But it still looks like you ran something close to a blank file through SA.
Make sure that the first line of the file you send to SA isn't blank, or
there is a prepended space on every line or some such.
Loren