I am applying for an internship and I am struggling with the subject of the cover letter.
"Re: Application for an internship as (name of the position) at (name of the company)"
What do you think about the sentence above? Is that correct? Would you rephrase it?
Yes, it is correct.
Depending on the intended audience I personally would try to shorten it. Maybe don't do it if you are applying to be an English teacher.
Application for internship ...
Language's foremost purpose is communication. Being correct secondary. Long texts in applications and emails are more likely to be skipped. If they don't get read, they didn't communicate.
Depending on the position, it might be more natural to say "[position] internship". And depending on the situation, "at [name of company]" may be redundant; if you're sending the cover letter to the company, rather than a recruiter, they probably already know what the name of their company is. More useful would be your name and the fact that it's a cover letter; if it's an email address specifically set up to receive applications for this position, then sending an email with a subject line consisting of nothing but the fact that it's an application for that position tells them nothing at all other than you have the right email address. Also, in emails, "re" is short for "reply", not "regarding", so if this is the first email, rather than a reply, you should drop that.
So something like "GrazioL cover letter for [position] internship application".
