#16574 - avoid a message being duplicated every time it is re-requeued.
#16574 - avoid a message being duplicated every time it is re-requeued.

bramley/phplist3,mariez/phplist3,bramley/phplist3,phpList/phplist3,tarekdj/phplist3,tarekdj/phplist3,mariez/phplist3,tarekdj/phplist3,danwaterloo/phplist3,byronjumbo/phplist3,bramley/phplist3,byronjumbo/phplist3,danwaterloo/phplist3,samtuke/phplist3,mariez/phplist3,danwaterloo/phplist3,samtuke/phplist3,danwaterloo/phplist3,samtuke/phplist3,byronjumbo/phplist3,tarekdj/phplist3,byronjumbo/phplist3,byronjumbo/phplist3,mariez/phplist3,phpList/phplist3,phpList/phplist3,tarekdj/phplist3,phpList/phplist3,bramley/phplist3,mariez/phplist3,bramley/phplist3,samtuke/phplist3,samtuke/phplist3,phpList/phplist3,danwaterloo/phplist3