An unknown attacker appears to have deleted 18 years’ worth of customer emails, along with all backup copies of the data, at email provider VFEmail. The attack, described in a series of tweets from the firm, seems to have targeted all of the company’s externally facing servers across data centers. The motive seems to be “just attack and destroy,” the company said. Experts say the attack is an example of the devastating consequences of not having a well thought-out strategy for secure data backup and recovery.”]