If you are the one dealing with the issue of forgotten or lost Spectrum email account then you need to setup the account again. To know then open web browser on computer and proceed to Spectrum email sign-in page. Now, enter the login username in required space and tap to forgot password link. Here, you will be asked to enter the CAPTCHA, enter it and tap next. Enter alternate email ID or registered phone number. Lastly, click to next and follow the on-screen instructions to set the new password for Spectrum email account.
To see this working, head to your live site.