Using Windows 11 and recently activated Windows Security and removed McAfee antivirus. Since this was completed, MS Outlook would not send emails so I was instructed by my ISP to switch to Thunderbird. Now using Thunderbird and I am able to receive emails but cannot send. Attached are the mail settings that were given to me by my local cable company (MCTV Ohio). Any ideas how to fix this so that I can send emails? The message just "clocks" showing sending for hours...never actually sends the email. I know the issue is not on the end of the ISP because I am able to send on their web, just not through Thunderbird.