protocol specific AuthDatabase Queries

Hi,

i have to configure different sql-queries for protocol lmtp, another for
protocol smtp and one query for other protocols.

I have configured in "/etc/dovecot/conf.d/auth-sql.conf.ext" one entry
for all protocols and 2 protocol specific entries:

protocol lmtp {
passdb {
driver = sql
args = /etc/dovecot/dovecot-lmtp-sql.conf.ext

protocol smtp {
passdb {
driver = sql
args = /etc/dovecot/dovecot-smtp-sql.conf.ext

passdb {
driver = sql
args = /etc/dovecot/dovecot-sql.conf.ext

is this correct or do i have to configure all possible protocols
seperately?

First i had a working configuration for all protocols except for lmtp
(but now i need additionally a special query for smtp):

protocol !lmtp {
..

protocol lmtp {
..

Can you tell me whats the prefered configuration?

Thanks

Claus