Dovecot Lua
Intergation of Nauthilus in a Dovecot Lua backend
HAProxy
HAProxy configuration with Nauthilus
Nginx mail plugin
Nginx configuration for Nauthilus
Fail2Ban
Fail2Ban configuration for RBLs and other failed logins
PAM (pam_nauthilus)
Complete guide for the contrib/pam_nauthilus PAM module