I am suddenly unable to connect my iMac to Frontier's mail server
I'm running an M1 iMac with ventura.
Frontier email accessed through mail suddenly stopped working yesterday. I have three POP mail accounts and all stopped working. Can neither send or receive and get a message that it can not connect to the server. I can still access the accounts on my iPhone and iPad.
I spent an hour working with the Frontier chat guy making sure I have the right servers listed & etc and we can't seem to get the connection. He gave up and said I should ask Apple as they must have changed something.
He even tried to set up a new account on my macmail and got the same problem. Get the same messages, etc. Like "can't verify settings", etc.
Any advice? Email was fine Friday & dead on Saturday.
I am distraught. Going elsewhere will not solve my issue as my email address is commonly used across my life.
[Re-titled by Moderator]
iMac 21.5″, macOS 10.15