Mail Server Settings
Suddenly lost ability to send or receive emails on 2 MBPs w/same OS 10.13.6. simultaneously lost ability to use Safari also on most URLs. Some went through. WiFi indicated a connection to router and router was connected to ISP as verified by using iPhone and iPad on same wifi with connections to Mail server and web Social Media. My prior mail server settings recommended by Apple Support Mail Server Settings were APOP and SMTPAUTH. I checked again and the recommendations now said use IMAP settings which were different. However neither set work! Connection Doctor NEVER connects. Safari NEVER connects on almost all URLs.!
I can only assume that I have been targeted by malicious malware in some way. I connect with WiFi ONLY when I'm on the computer working. When I quit I also turn off the wifi before going to standby. I was hacked by some one using my name on FB who commented "unfavorably" on iMessage (FB). Friends asked what I was doing. Of course, nothing. He flew a South African banner on his "smirk".
I have restarted many times and each time preceded it with an application of "First Aid". I seem to have gotten my Safari browser to work correctly now but NOT Mail. I can go straight to Earthlink Mail and see all my emails, but I can't download them or use my Mail Client to send messages. When checking my server settings, it tries to verify but never can. My user name & PW are the same as what I'm using successfully on my smart devices that do get through! I don't know what else to try.
MacBook Pro