Some sites may not accept an email address that includes a subdomain (@subdomain.mozmail.com) and others have stopped accepting all addresses except those from Gmail, Hotmail, or Yahoo accounts.
Beberapa situs mungkin tidak menerima alamat surel yang menyertakan subdomain (@subdomain.mozmail.com) dan yang lain telah berhenti menerima semua alamat kecuali akun Gmail, Hotmail, atau Yahoo.