my email address is seven years old and I have emails that I don’t want to lose in it, that is why I keep it even if it is really stupid.
I don’t understand what you mean with a “better one”, but I can create a different email address or you can write me on my university email address…
dear xyz, we all run several different characters in our life: I am teacher at Bocconi, I work as professional in design field, I have my friends and so on.
If I have a very intense email life with my friends from grade school, then of course I am supposed to use an account with a very funny/jolly/silly name. At the same if I have to send an email to professor Baia Curioni in Bocconi University, to use: email@example.com, could be not so good.
If I write you from the mail account: firstname.lastname@example.org, I am definitely defining myself as a very strange and curious and odd teacher. The same goes for you (as a student at Bocconi) writing to your professor.
It is not a substantial issue, it is a tiny detail.
just, so many times , the relevan bits of our lifes are made by tiny details.
(image on top: Charles and Ray Eames, House of Cards, 1952)