[Exim] smtp auth via courier-imap authdaemon

I'm trying this out. Things aren't working so well.

The exim FAQ suggests this hack:

    login:
      driver = plaintext
      public_name = LOGIN
      server_prompts = Username:: : Password::
      server_condition = \
        ${if eq {${readsocket{/var/run/courier/authdaemon/socket}\
        {AUTH 76\n${length_76:exim\nlogin\n$1\n$2\
        \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\
        \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\
        \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n}}}}{FAIL\n} {no}{yes}}
      server_set_id = $1

That didn't work out of the box. Surprise.

I realized that courier 3.0.2 changed things to:
    /var/run/authdaemon.courier-imap/socket

So I tried that change too.

No Luck.

Anyone have this going?