Dovecot with LDAP Proxy

Hello,

configuring Dovecot with LDAP authentication, adding the parameter in ther sql config file:

pass_attrs =
=proxy=y

I see then backend connections always addressed to localhot port 143:

/user=utente1@domanin.com proxy   lip=127.0.0.1   lport=143   /

while I expect that connections would be managed by the director and then addressed to my backend IPs and specific port. Is there a way to configure ldap proxy to get that behavior?

Thanks in advance.

-federico