Apparently the spammers don’t know much about the business conducted in appellate courts—the e-mail purports to be a “pre-trial notice.” According to the Fifth Circuit’s warning, the e-mail instructs the reader to click on a link “to check your complaint once again and confirm it. If we do not get your confirmation the claim will be cancelled.”
The courts are warning people to check the sender’s e-mail address to see whether it matches the court’s domain name. While that is good advice, it’s not foolproof. The best defense against malicious e-mail is some healthy skepticism. If an e-mail is unexpected and its message doesn’t make sense, it’s probably malicious. If it invites you to click on a link or open an attachment—don’t.