Extra info for #29364

configuration.nix

  services.dovecot2 = {
    enable = true;
    enableImap = true;
    enablePop3 = false;
    mailLocation = "maildir:~/Maildir";
    sslServerCert = "/var/lib/acme/rodney.id.au/fullchain.pem";
    sslServerKey = "/var/lib/acme/rodney.id.au/key.pem";
    extraConfig = ''
      service auth {
        unix_listener /var/lib/postfix/data/auth {
          mode = 0660
          # Assuming the default Postfix user and group
          user = postfix
          group = postfix
        }
      }
    '';
  };