[Dovecot] login and plain-md5 in sql query

[Adrian Stoica]

i use last dovecot rc23 with users/passwords in mysql

1) How can i define a sql query for each auth mechanism ?

2)Why i can't set "default_pass_scheme = login" in my dovecot-sql.conf? :

dovecot: Feb 21 09:46:22 Info: auth(default): client in: AUTH   1       
PLAIN   service=IMAP    secured lip=127.0.0.1   rip=127.0.0.1      
resp=AGFkaUBhZHJpYW4uZXUAcGFyb2xh
dovecot: Feb 21 09:46:22 Info: auth-worker(default): 
sql(adi at adrian.eu,127.0.0.1): query: SELECT 
IF('adrian.eu'='',clear,crypt) AS password , user FROM mailbox WHERE 
user = 'adi' AND domain = 'adrian.eu' AND status = '1' LIMIT 1
dovecot: Feb 21 09:46:22 Info: auth-worker(default): 
auth(adi at adrian.eu,127.0.0.1): username changed adi at adrian.eu -> adi
dovecot: Feb 21 09:46:22 Error: auth-worker(default): 
sql(adi,127.0.0.1): Unknown password scheme login
dovecot: Feb 21 09:46:23 Info: auth(default): client out: FAIL  1       
user=adi at adrian.eu
dovecot: Feb 21 09:46:23 Info: imap-login: Disconnected: 
user=<adi at adrian.eu>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured


3)Whi i can't use plain-md5 in dovecot.conf  :

auth default {
mechanisms = login plain <- plain-md5
passdb sql {
args=/etc/dovecot-sql.conf
}
userdb sql {
args=/etc/dovecot-sql.conf
}
}

dovecot: Feb 21 09:43:48 Error: auth(default): Unknown authentication 
mechanism 'plain-md5'