Redmine

Hi,

Since some time Redmine give me this error message
Erreur lors de l'envoi de l'email (535 5.7.0 authentication failed )
when using the test link in
Administration/config/email notification/Envoyer un email de test (sending an email test)

But the mailing system exim4 on that Debian 6.0.3 is working fine
I made some test with for instance folowwing script

echo "Un message de test de la 150" | mail -s "sujet de test" myself@gmail.com
or with a PHP script like

function mysendmail($cible,$zemessage) {
echo $cible;
echo $zemessage;

$to = $cible;
$subject = 'tracemail swiss';
$message = $zemessage.date("d/m/Y:H:m:s");
$headers = 'From: gab@uzo.net';
mail($to,$subject,$message,$headers);
}

$monmessage = "TEST_MAIL_150";
echo "MAIN TEST MAIL 150";
mysendmail("myself@gmail.com",$monmessage);

?>

And every thing works fine , also the local application

I also rebooted apache

BUT REDMINE DOES NOT WANT TO SEND A MAIL
where can i check things the log file in /var/log/redmine don't show any error message

Can somebody help me for this case

Thanks

Marc