Categories October Surprise 2024 Outlook 365 and Optimum email – Microsoft Community Post author By Post date June 19, 2025 I recently installed Outlook 365. When I put in my Cablevision/Optimum email account, I got a message saying “We couldn’t find info for that account….” My account ends with @optonline.net. I am inputting POP and mail.optonline.net