Delta Has No-Fly-Listed Roughly 250 Passengers as of Aug. 27

(CNN) - As of August 27, Delta Airlines said it has banned roughly 240 people from flying with the carrier. 

Delta Airlines' mask policy is not a suggestion, it's mandatory. Passengers refusing to abide by the rule to keep masks on at all times (save eating or drinking) don't get to fly with Delta.

"Although rare, we continue to put passengers who refuse to follow the required face-covering rules on our no-fly list," says Delta CEO Ed Bastian in an internal memo to employees shared with CNN.

The memo celebrates the opening of Delta's new Salt Lake City hub and included references to the airline's current state of affairs, its continued growth and the considerable impact that Covid-19 has had on managing the health and safety of staff and passengers.

"Systemwide, we continue to identify opportunities to speed up our airport projects and position Delta to lead in the recovery with world-class facilities that will help us transform the customer experience," writes Bastian.