Can my teacher mail in rec letters for coalition app rather than submitting to locker?

Hi, so i emailed my teacher asking for a rec letter for coalition app, since there were some schools I wanted to apply there. He said the platform was rather disorganized for him in the past and wanted instead to mail them in? Is this ok? Do i need to select a certain option when the college requests for his rec letter? Thanks!

In general, it’s OK to mail, but it’s really up to the colleges to which you are applying. Ask them.