dovecot-ldap.conf.ext for FreeIPA usage

[Matt .]

Hello,

I'm figuring out how to auth users against FreeIPA and I wonder if
someone did this without GSAPI.

My users are stored in a mysql DB where I wonder what I shall use as
authname, the username or the mailaddress. As the mailaddress is
always unique it could be best but if a user has multiple
mailaddresses under seperate domains username might be better.

Any clue here and maybe an example for dovecot-ldap.conf.ext when
using FreeIPA ?

Thanks!

Matt