looks like some problem with your rc script.
could you paste the line where qmail-pop3d,qmail-popup and vpopmail are started (actually only qmail-popup is started.. but the others should appear in the same line)
thanks you for your help at all i find cause of this last mail i modify my rc.startmail like this
echo "Starting Qmail and Vpopmail daemons ..."
/usr/local/bin/tcpserver -v -H -R -x /etc/tcp.smtp.cdb -c20 -u1033 -g103 0 smtp /usr/local/bin/recordio /var/qmail/bin/qmail-smtpd 2>&1 >/dev/null &
/usr/local/bin/tcpserver -v -H -R 0 pop3 /usr/local/bin/recordio /var/qmail/bin/qmail-popup linux-pour-lesnuls.com /var/vpopmail/bin/vchkpw /var/qmail/bin/qmail-pop3d Maildir
to delete the \ just before linux-pour-lesnuls.com and that works fine
thanks for your express and nicely help