Question : Domain wildcard and Block Senders in Exchange 2007 SP1

I'm getting spam from domains that keep changing numbers in the back it.  I tried something like abc*.* and it says invalid SMTP domain.  I also tried the Set-SenderFilterConfig cmdlet with the wildcard and same error.  How can I add a wildcard to the Block Senders list?

Answer : Domain wildcard and Block Senders in Exchange 2007 SP1

I confirmed with Microsoft: as of SP1, the wildcard function in Sender Filtering is broken and will be addressed in a future update.