CentOS - Mar 2008 - CentOS 5.1 - MySQL 5.0.22 - Courier auth lib problem

Hi

I am finishing my mail server config and just trying to get the mysql 
login working - it fails to connect and thorws the following error

Mar 21 21:58:21 mail0 authdaemond: failed to connect to mysql server 
(server=localhost, userid=courier): Can't connect to local MySQL server 
through socket '/tmp/mysql.sock.' (2)
Mar 21 21:58:21 mail0 couriertcpd: LOGIN FAILED, user=tom at xxx.xxx, 
ip=[::ffff:192.168.10.200]
Mar 21 21:58:21 mail0 couriertcpd: authentication error: Input/output error

The socket exists

# ll /tmp/mysql.sock
srwxrwxrwx 1 mysql mysql 0 Mar 21 21:53 /tmp/mysql.sock

and mysql seems to be working fine using the same credentials

# mysql -S /tmp/mysql.sock -u courier -pxxxxxx
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 7 to server version: 5.0.22

Type 'help;' or '\h' for help. Type '\c' to clear the
buffer.

mysql>

some bits from the my.cnf

[client]
port        = 3306
socket        = /tmp/mysql.sock

[mysqld]
port        = 3306
datadir        = /var/lib/mysql
socket        = /tmp/mysql.sock

any ideas as i am a bit stumped

thanks

>
>
> I am finishing my mail server config and just trying to get the mysql 
> login working - it fails to connect and thorws the following error
>
> Mar 21 21:58:21 mail0 authdaemond: failed to connect to mysql server 
> (server=localhost, userid=courier): Can't connect to local MySQL 
> server through socket '/tmp/mysql.sock.' (2)
> Mar 21 21:58:21 mail0 couriertcpd: LOGIN FAILED, user=tom at xxx.xxx, 
> ip=[::ffff:192.168.10.200]
> Mar 21 21:58:21 mail0 couriertcpd: authentication error: Input/output 
> error
>
> The socket exists
>
> # ll /tmp/mysql.sock
> srwxrwxrwx 1 mysql mysql 0 Mar 21 21:53 /tmp/mysql.sock
>
> and mysql seems to be working fine using the same credentials
>
> # mysql -S /tmp/mysql.sock -u courier -pxxxxxx
> Welcome to the MySQL monitor.  Commands end with ; or \g.
> Your MySQL connection id is 7 to server version: 5.0.22
>
> Type 'help;' or '\h' for help. Type '\c' to clear
the buffer.
>
> mysql>
>
> some bits from the my.cnf
>
> [client]
> port        = 3306
> socket        = /tmp/mysql.sock
>
> [mysqld]
> port        = 3306
> datadir        = /var/lib/mysql
> socket        = /tmp/mysql.sock
>
> any ideas as i am a bit stumped

in the end i resolved this by removing the use of sockets from 
authdaemond and used tcp connections instead