That was my initial thought. So I am not sure if just a postfix update to version 3.4.11 (or 3.5.2 in Groovy) fixes the mentioned issue.
FWIW, I have a PPA here with the version 3.4.11 built in Focal and the behavior is the same as version 3.5.2 in Groovy: https://launchpad.net/~lucaskanashiro/+archive/ubuntu/focal-postifx- lp1868955/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1868955 Title: after upgrade to 20.04: posttls cannot connect to private/tlsmgr To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1868955/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs