Delete emails from unknown senders with nonsensical information, subject line typos, or suspicious links. (srpfcu.org)
Go to Settings > Messages and toggle on the Filter Unknown Senders option. (digitaltrends.com)
He also says that all lawyers and their staff must ensure they don't open attachments from unknown senders as they can contain spyware that could let third parties obtain confidential client information. (canadianlawyermag.com)