I had this problem when my database was corrupt. You can check this

cd /var/lib/mysql/vpopmail
myisamchk *.MYI

if any is corrupt, just add -r

----- Original Message ----- 
From: "David Erickson" <[EMAIL PROTECTED]>
Sent: Sunday, August 21, 2005 6:34 PM
Subject: [vchkpw] Sporadic mail auth failures

> Hi we've been battling a very strange problem with our server for awhile
> now.  Periodically when a user tries to send mail (using smtp auth), or
> check his/her pop3 box, we get auth failures.  What happens is youll have
> auth 3-4 times before it'll actually go through (even though you are
> entering the same credentials every time).  It is very frustrating.  Upon
> examining the logs here is what we are getting:
> Aug 21 10:08:04 mail authdaemond: vmysql: sql error[3]: Lost connection to
> MySQL server during query
> Now I know the username/pw work to connect to the database because it does
> eventually auth.  The mysql server is on the same machine as well.
> have any ideas what this could be indicative of?
> Mysql server 4.1.8
> Vpopmail 5.4.10
> Thanks,
> David

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