stanbudbea67 wrote:
What is odd when I left my house and went elsewhere mail came in on my cell when it did not at my home nor on my iMac. But when home mail does not work on cell and still not on iMac Mac mail. Very odd
That points to your Internet Provider as you are using their IP Address when you are on your home WiFi and on cellular, the IP Address is determined by the Cellular Provider. Contact your Internet Provider. They will be able to change your IP Address, but more importantly they should be able to tell you what caused it to be blacklisted in the first place.