I just signed up at Libera Folio and it asked for my retadreso and I typed the URL to my YouTube account. It gave an error and I then realized that it wanted my e-mail address.
I learned retpoŝtadreso for e-mail address. I have been under the (apparently wrong) impression that retadreso meant URL.
Which one should I use? Does retadreso always, in all cases, mean e-mail address?