I recently went to a summer program. Now, I’m asking my mentor there for a recommendation for college. The email account she uses for all correspondences related to the program is private (Gmail). The institution she works at is not related to the summer program in any way. Now, the college asks for the letter to be sent through institutional email accounts (letters from private accounts will be subject to further review).
She wouldn’t be sending the letter in her capacity as professor at the college she works at, but rather as mentor in the program, an institution in itself.
So should I ask her to send it through her private or institutional email account?