I retrieve the mail once a week, on Sundays. I may check more often if I'm expecting something important, or if the moon is in alignment with Uranus. I've proved that I am not obsessive-compulsive about the mail, but nobody's listening. I doubt at this point the Prof would even remember the incident that pissed me off.
They're all games I can't win, so I've stopped playing. I'm no longer playing martyr, I'm no longer playing useful flunky, I'm no longer playing Kreskin. If I need the mail, I'll get mine in. If I don't need the mail, I may or not bother. It's obviously good enough, so why invest any more of my ego in it?