Via Jim Calloway, this story tells of some lawyers in Colorado who missed a hearing in federal court because they had ratcheted up their spam filter and it started treating the federal court notices as spam.
Calloway says you must white-list the courts no matter what.
The cheapskate that I am, I/we use as our spam filter a program called SpamBayes, which has no white-listing feature, and here's why. The FAQ says in part: "If you really need whitelisting, consider implementing rules in your mailer to intercept the messages before they're passed to SpamBayes." I suppose it would not be too hard to write an Outlook e-mail rule for ECF/CMF messages. Or, we might break down and buy something like InBoxer.