I want to know what is the recommended way to use Re: in the subject line of an email.
I use Re: in the subject line as a shortform of 'in regards to'.
Whenever I have used Re:, people have told me that Re: is only to be used when replying to an incoming email and shouldn't be used when starting a new email thread.
I remember being taught that Re is an preposition, which means “in the matter of, with reference to.”
I have also observed that I get immediate responses if I use Re: in the subject line.
So, should I continue to use Re: in the subject line or is that incorrect usage?