Nothing on the Spark website to advise any changes nor notes this. Mail just stopped working.
the problem is , Sparks website can sometimes be a hard to navigate mess. All sparkle, no substance (many other ISPs website are much worse)
Not sure why this page is still up, as is . Surely users should be taken to a newer webpage with newer info
This page has some more relevant info
" So if you're having trouble sending and receiving email, it may well be that you need to update your email client or operating system to make sure it has the latest security measures in place."
"Given the number of email clients and operating systems out there and increasingly complex email set ups, it's impossible for us to state clearly whether your specific set up is supported from a security perspective. "