No. The first one might have letters or signs that are not accepted for e-mail addresses, the second one is only a e-mail address that does not exist, one that nobody has created before but can do both, feature accepted letters and signs or unaccepted ones.

Pagan Del verbo pagar ¿Cuál es el verbo que falta y que significaría si quitamos... -------- ? I do not get this part: la una de la otra nadie debe nada

It sounds like someone has not understood you previously, but a woman that you know is going to understand.