Whitelist not working in Squirrel mail

I have several dozen email addresses “white listed” in my Junk Mail settings in Squirrel mail (domain wide) - for example: @creativecow.net
Yet Squirrel mail keeps quarantining all emails that come from creativecow.net
And that’s just one example. Several other emails from similar sites keep getting blocked. Does anyone have any idea how to stop this? After all, the whole point of a white list is to not have good emails with “spam-like” content (lots of pics and links with little copy) be quarantined.
I’m getting sick of having to check the stupid junk mail folder daily and constantly permitting certain emails through.
Blacklisting works pretty well, though.
Any help? Thanks

Happy New Year!!