Cannot Get Mail - Network Error (POSIX 61)

I have the same problem, have upgraded to iso 18.2 and still have the problem. Had Apple support on the phone and contacted my email server provider, no resolutions. I have fought this for the last 2 weeks!!!!

Me too!!!!!!!!

I have this exact same problem with my Yahoo mail account. This has worked flawlessly for literally decades.

Update: I managed to resolve it by disabling VPN.

I tried the disabling of the VPN with no success. I even tried resetting my network connection, as advised by Apple support. I am so frustrated with this Apple screwup. I have been up until 3am several nights trying to figure this out.

It is strange that I am receiving incoming mail (but yet it gives me that error message that I am NOT connected to the imap incoming server) and it only populates some of my folders and when it does, it takes a long time...runs very slow. Also, when I make changes on the iPhone, it does NOT sync up with the ISP mail server. My MS computer's Outlook mail is running fine...which tells me that the Mediacom setting I am using for the iPhone are correct.

I had this Same issue until I signed into iCloud on My PC and selected Mail it prompted up some stuff and once I made My Choice, I Forced closed My Mail app and then reopened it and the Error was Gone

I was having the exact same issue with my AOL email accounts. I noticed it was because I was connected to the VPN. If I disconect the VPN, the email starts working again.

Once my VPN was switched off it started working again.

I had this exact problem! BUT I remembered that I installed a VPN app the night before it started, turning it off did not work but uninstalling it DID! Hope this helps someone.