site can't be reached
Our internet co. was taken over by Zito on October 1, 2022. Since that time I have been only very sporadically, able to connect my two business emails to roundcube and or webmail. I get a message saying "site cannot be reached" and "altapassorchard.org refused to connect." this is when I am on my MacBook. When I do same from my iPhone (which uses verizon) I have no problem connecting. After repeated calls and emails to Zito, I am now told to call and since I don't use their modem, they will have me ping the server. I have no idea what I'm doing. any guidance?
MacBook Pro 13″, macOS 10.14