I didn't wish him one because i didn't believe there was any point. He had dumped me because he wasn't at a point in his life where he was ready for a serious relationship and i assumed he had no feelings for me.
The only reason i would have wished him one would be in hopes of it starting a conversation because i miss him but i stayed on the safe side because i assumed he would not miss or want me.
Can anyone suggest why he would send it? or if you have wished an ex happy birthday why did you do it? and what was your thinking behind it