My campus email always kinda sucked, so I always had everything forwarded through my gmail account, it's the same name, just @gmail.com vs @college.edu. I don't think I've used my .edu for anything besides group work in classes.
My work email sig has PharmD Rph, but I really only email my DM and a few others on occasion, not that I'm sending tons of professional correspondence to colleagues.
If it's for a job application, I can see why still using a student.edu might not be the best. It kind of gives the impression you're fresh out of school vs. an experienced rph.