Email affiliation for an undergraduate student with a complex university address Imagine I'm doing research on my own, and studying at a university. I publish this research, get accepted, and now I have to provide my affiliation. I have no problems of course using my university and the department I'm studying for, and in fact, I want to. However, I've read (on this site) that using my personal @gmail.com email looks unprofessional even if you provide the university as affiliation. I have a student email but looks quite awful like: lmatteis.123112311@studenti.uniroma1.it - where the number is my student code number.

Is that ugly email better than a personal @gmail.com email?

Another option would be that I go talk to a professor, show that the paper got accepted and ask them whether they can give me a quick affiliation; provide me with the email... but then I'd probably need to add the professor as a co-author as well, which I guess is also fine? This option would however take much longer. But maybe a good way to build connections with professors in the department.

Thoughts?

EDIT

The question that appears linked is a different question. It talks about "rotting emails" and the possibility of using your personal email to avoid that. My question is regarding what email I should provide for a research that I want my university to be affiliated with, although I haven't been officially given any email by the university (apart from my student email).
Use your university address, even if it is weird and complicated.  Nobody will hold an official bureaucratic policy of your university against you.

You may, however, wish to see if your university supports email aliases.  Many universities have an official "full" email address, but also a shorter and easier version.  Others allow you to activate your alumni account even while still a student, and you might then use that alternate (and persistent!) address.

Separately: do not hide your paper from your professor.  Assuming your professor is basically ethical, then either a) your professor should be an author and will explain why you should add them, or b) your professor should not be an author, in which case they'll celebrate you without asking to be added.