I upgraded openssl today in my server running testing. It installed version 1.1.0f-5. To my surprise, my mac clients can no longer send and receive email!
How do I roll back to the previous version of openssl? "apt-cache showpkg openssl" only shows version 1.1.0f-5. apt install openssl=1.1.0f-3 Reading package lists... Done Building dependency tree Reading state information... Done E: Version '1.1.0f-3' for 'openssl' was not found I gather I need to add something to my sources.list to get at the older versions.