DD has not received any mail from colleges, either. I know at one point I had marked "no 3rd party mailings" on her school registration paperwork because she was getting so much junk mail and charter school post cards, but I changed it last year so that she could get college mailings. She still has not received one college letter, even though her PSAT scores were great. I'm guessing that her mailing info never got updated.
Did you mark "no 3rd party mailings" on her high school paperwork? If memory serves, there is an area on the actual PSATs that the student has to check if he/she doesn't or does want to receive college mailings, which is unrelated to school paperwork.
I informed my child to check "no correspondence" for the freshmen and sophomore PSATs, but "yes" for the junior year. As a result, there were no mailings from colleges the first two years, but our mailbox has been swamped this year.