Undo Mark All as Read Command?

[Tommy Z.]

Is there any way to undo "Mark All as Read"? I accidentally selected it,
intending to select "Mark as Read" for one email.

 

[Mary]

Same way you marked them as read. Select all the messages, right click and
select mark as unread.

 

[Brian Tillman]

Is there any way to undo "Mark All as Read"? I accidentally selected
it, intending to select "Mark as Read" for one email.

Nope. There's no undo for that.