Suddenly I am unable to send emails, which are being blocked due to "suspicious activity." Yahoo help notes it is probably my ISP that is preventing my emails from being sent. How can I unblock this?

On Friday afternoon, I attempted to reply to emails in my Yahoo Inbox, but I received a pop-up message preventing me from sending the emails. It said that my emails cannot be sent due to suspected "suspicious activity" on my email account and cannot send it in order to protect me and those I am attempting to send the messages to. I looked up Yahoo Help and the online suggestion was that my ISP might be blocking the email and I might have to change my ISP address. My antivirus software carrier's server went down briefly a couple of weeks ago and I could not upload the updates until they were up and running again. I had some suspicious emails generated from my account during that time, without my knowledge. I changed my password immediately and updated my Email Protection through my antivirus software program. But now I can't send emails. Any suggestions? Thank you!

From the Mail menu bar, select
Window ▹ Connection Doctor
Click the Show Detail button. A drawer opens. Click Check Again and post the text that appears. Anonymize any personal information before posting.

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