[CentOS] Sieve Filter: All email not from friendly name?

I'm using Dovecot and Sieve under postfix on CentOS 6. Sieve filters are working great for a number of addresses.

I'm trying to set up a sieve filter that catches all email NOT from Cron Daemon. Nearly all Admin messages come from "Cron Daemon username@servername" so I want a Sieve Filter that will catch all addresses NOT from this address and stick it into a folder under INBOX/ProbablySpam but while other filters seem to work fine, this one does not. My best guess so far:

if anyof (not address :all :contains ["From"] "Cron Daemon") { fileinto "INBOX.ProbablySpam"; } ...

It passes validation checking in KMail, but seems to catch all inbound messages. What am I missing?

Thanks,

Ben