how to make your former tutor remember who you are?

It has been 3 years since I contacted my former school tutors. During the past few days in New Year, I wrote 7 emails to them, but I have received only one reply. "Dear XXX, Happy New Year. My name is XXX, and then year of graduation, student ID... During the xxx course, I had learnt... I hope you can arrange a time for a meeting with me... closing greeting Kitty

I am thinking if my tutors have marked my email as spams.

Had this ever happened to you?