"Yahoo doesn't use HTTPS encryption technology to protect the privacy of it's users. This means every email sent to and from a Yahoo! address in a web browser is out in the open, unprotected from hackers, governments, or anyone who uses widely available tools to break into these vulnerable email accounts.
Even if you don't use Yahoo! Mail - the privacy of your emails to Yahoo! addresses are at high-risk of being exposed.
Yahoo! has made promises for years that they would fix the problem, but have nothing to show for it. But with a new CEO and board trying to put their stamp on the organisation, this is our moment to ask Yahoo!"
If you want to do something about it then follow the link below.