And if you cannot dump the traffic, on the server with MySQL server, you can 
indeed activate MySQL logging

In my.cnf file (on Debian /etc/mysql/my.cnf), add the following lines

general_log_file        = /var/log/mysql/mysql.log
general_log             = 1
(in Debian just un-comment it)

Then re-try and take a look into the log file /var/log/mysql/mysql.log

-----Original Message-----
From: Todor Petkov [] 
Sent: jeudi 25 octobre 2012 09:22
Subject: Re: [vchkpw] vchkpw auth remote database

On 10/25/2012 10:17 AM, kengheng wrote:
> Hi, I've grant the privilege to user@vpopmailhost, however the 
> vpopmail behaviour as below:
> vuserinfo can query the user result
> however,when run vchkpw for smtp-auth, it return the err msg as below:
> vchkpw-submission: vpopmail user not found 
> On 10/23/12 11:07 PM, Thibault Richard wrote:
>> vuserinfo only make a SELECT, that why I asked for other rights

Can you dump the traffic between the mail server and mysql? I guess it will be 
easier than to start mysql with logging and see queries from other clients.

Otherwise the problem is quite strange..


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