Forwarding your Optonline, or Optimum Online, email to your Gmail account saves you the trouble of having to separately check each email account. When you receive a new email in your Optonline inbox, it is forwarded automatically to your Gmail account. Spam messages are not forwarded to your email. The mail-forwarding feature is available as part of your email service. You can activate or deactivate the forwarding feature at any time from within your email account's settings.
Open a Web browser and access your Optonline email account. Provide your user name and password to log in to your account.
Click "Options" in the upper-right corner and then click "Mail."
Click "Settings" and then click "Mail Forwarding."
Check "Enable Forwarding" and enter your entire Gmail address.
Click "Save" to forward all your incoming emails to your Gmail account.