Thank you for submitting your manuscript "Article title" which we are regretfully unable to offer to publish.
It is YYY' policy to return a substantial proportion of manuscripts without sending them to referees. Decisions of this kind are made by the editors of YYYs according to the demanding editorial criteria of the journal.
In the present case, while your findings may well prove stimulating to others' thinking about such questions, we regret that we are unable to conclude that the work provides the sort of firm advance in general understanding that would warrant publication in YYY.
We are sorry that we cannot respond more positively on this occasion.
Why they do not send my work to referees while they are unable to conclude that the work provides the sort of firm advance?