Turning off the annoying spamassassin message encapsulation on BlueHost's servers.
Spamassassin is a great spam killing tool. BlueHost offers it as one of the spam protection options on their e-mail accounts. The cPanel configuration interface for spamassassin is a bit lacking. It only has some common, bare minimum options available.
One thing that spamassassin does that is a bit annoying is it encapsulates all suspected spam messages in a new message, and attaches the original message. This is nice for some things, but can be quite annoying when a legitimate message is crippled in this way.
Spamassassin is highly configurable, and you can do this easily. You just have to do it "manually" and not use the cPanel interface.
If you have SSH enabled, the SSH way is probably the easiest.
$ ssh username@example.com
username@example.com's password:
Last login: Wed Feb 11 11:10:07 2009
[~]# echo "report_safe 0" >> .spamassassin/user_prefs
[~]# exit
$
All that this does is add "report_safe 0" on a new line at the bottom of your preferences file. If you don't have SSH enabled, or you are not comfortable using SSH, you can still do this.
The (s)FTP way. If you usually connect via sftp or ftp, you can do this too. Just change to your .spamassassin directory, download the user_prefs file, add "report_safe 0" to the bottom of the file, and send it back.
The (Legacy) File Manager way. If you are using Legacy File Manager or File Manager in your cPanel interface, you can also do this. When you open up either of these applications, it asks you if you want to show hidden files. Say YES. Also, make sure you are opening your file manager to browse your whole home directory instead of just your public_html directory. Navigate to the ".spamassassin" directory, and edit the "user_prefs" file. Add "report_safe 0" to the bottom of this file and save it.
After adding this line to the bottom of the file, go back into your cPanel, and into the spamassassin configuration page. "report_safe" should now be an option. The cPanel page did not have this before. It won't blow away options that it doesn't recognize. If you ever want the old behavior back, you can change "report_safe" to 1 in this web interface. You won't need to manually edit the user_prefs file again.
To check to see if it works, forward yourself some spam.