An employee in the billing department accidentally sent a spreadsheet containing payment card data to a recipient outside the organization The employee intended to send the spreadsheet to an internal staff member with a similar name and was unaware of the mistake until the recipient replied to the message In addition to retraining the employee, which of the following would prevent this from happening in the future?
A . Implement outgoing filter rules to quarantine messages that contain card data
B . Configure the outgoing mail filter to allow attachments only to addresses on the whitelist
C . Remove all external recipients from the employee’s address book
D . Set the outgoing mail filter to strip spreadsheet attachments from all messages.
Answer: B