[Dovecot] postlogin script

Hi,

I have Postfix + OpenLdap + DoveCot configuration, and it's running succesfuly,

i wantto convert users pop3 password NTPassword and LMPassword, so i ne plain passwor dof users,

how can i do that. (Normaly using perl's ntlmgen function i convert password , but in plain)

thanks in advance