I received the following rejection email today :
Dear Prof. XXX,
This message concerns the manuscript
XXXX by XXX
submitted to XXXXX journal.
Informal consultations with possible reviewers have persuaded me that your article is too specialized for our journal, and therefore I am sorry to say we cannot accept it for publication. We have elected not to review it fully so as not to cause undue delays in its eventual publication.
I advise you to submit it to a journal more narrowly focused on number theory, and I do wish you success in publishing it elsewhere.
Now, my question is:
Are there any positives/negatives that can be taken from this email ? or, it is just a desk rejection ?
Note that I received this email 20 days after the submission.