@choweg -- I have been getting the same "congra" messages, but to a non-Shaw E-mail ID.
The "nothing in the body" situation occurs because the spammer has hand-crafted the E-mail message incorrectly.
If you use "view source" of the message, the "plain-text" version of the "body" of the E-mail really is empty, but the "HTML-version" contains the spammer's message, and hyperlinks to the spammer's web-site(s).
While you are "viewing source", copy-and-paste the whole message, with all E-mail headers, and send an E-mail to Shaw, via the ID: internet.abuse@shaw.ca for them to investigate the source of the spammer's E-mail.
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Here is an example of the "empty" plain-text body, plus the "rich-text" content.
From: Portable Cooler <xmOefCs@seb.se>
Subject:FreezAir Pro
---=Part.1d5f913.1c29d0bba1e01116.173ff04f0a0.565294f806d4b3dc=-
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset=UTF-8
---=Part.1d5f913.1c29d0bba1e01116.173ff04f0a0.565294f806d4b3dc=-
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset=UTF-8
<center>
<a href=3D"htttp://ow.ly/&wNdn30r6MsH" >
<h1>Fj_You Need This Cool AC Box_Fj</H1> <img src=3D'htttp://ow.ly/&BhgY30r6Mt5' />
</a>
<a href=3D"htttp://ow.ly/&4d4t30r6MsU"><br>unsub </a>
</div>
-----------------------
Notice that there is no "<div>" tag to match the "</div>" tag -- a sign of a "hand-crafted" message, done incorrectly.
Also, the "</center>" tag is missing.
