Undo accidental marking of all email as read.

[Guest]

Some mail items were marked as unread. User accidentally selected all mail
and marked it as read. User wants to undo/reverse action so that unread mail
is again marked as unread.

Appreciate any assistance,
Judy

 

[Guest]

Right click on all the mail and mark as unread.

 

[Brian Tillman]

Some mail items were marked as unread. User accidentally selected
all mail and marked it as read. User wants to undo/reverse action so
that unread mail is again marked as unread.

There is no "undo" for that. As Mary said, you have to choose which
messages you want to consider unread and mark them so individually.