I have a manuscript which has been submitted and rejected by a journal. I am now preparing the manuscript for submission to another journal.
The cover letter guidelines for the new journal state that I need to confirm the content of the manuscript has not been published or submitted for publication elsewhere.
Does this mean I should let them know it has already been submitted (and rejected) elsewhere? Or is the intent of this section to make sure I am not submitting the same content to multiple journals at once (which I know is bad practice) meaning there is no need to state it has been rejected by another journal?