[archive] Mail client configuration for d-thinker.org mailbox

[lingu]

We had a lot of problem configuring thunderbird on centos 8 to talk with our zimbra mail server. I tried to configure openssl config to use MinProtocol = TLSv1 and it works for 'openssl s_client' but does not work with thunrderbird. Finally, I downloaded thunderbird 68.10 from https://www.thunderbird.net/en-US/ and it appears to work well with our zimbra mail server.