Very new here to duo, so apologies if this is answered elsewhere.
We would like to add security to our unix server for direct access (ssh), web access and email. I have already set things up for ssh and have some confidence that there is a path forward for web pages, but am unclear on how to proceed for our postfix email server. It would be nice if MUAs connecting via imap/pop would periodically (daily?) require a duo checkin. Looking at this site I’m wondering if something similar could be done using an imap proxy server: