Apologies for multiple emails to this list for the same problem. Some internet searches got me to the right solution.
One of the other posters was correct; it was a certificate issue. Reissued my
cert on my postfix SMTP mail gateways.
All seems to be working now. Gmail defaults to TLS 1.2
I saw some posts that TLS 1.3 still has issues with OpenSSL v1.1.1 and postfix
3.3.x
I am using Ubuntu Linux and the latest postfix which is 3.3.0 unfortunately
Edward Ray
