Tcpserver: fatal: unable to bind: address already used

@40000000522b62012f1e4374 tcpserver: fatal: unable to bind: address already used
@40000000522b62023056ea84 tcpserver: fatal: unable to bind: address already used
@40000000522b620331e86bac tcpserver: fatal: unable to bind: address already used
@40000000522b620432e4f034 tcpserver: fatal: unable to bind: address already used
@40000000522b62053451073c tcpserver: fatal: unable to bind: address already used
@40000000522b620635b05ca4 tcpserver: fatal: unable to bind: address already used
@40000000522b6207374953f4 tcpserver: fatal: unable to bind: address already used
@40000000522b620838caa0ac tcpserver: fatal: unable to bind: address already used
@40000000522b62093a3bb50c tcpserver: fatal: unable to bind: address already used


qmailctl stop
nmap localhost
show this,  should be port 25 is running, then stop it.
and start
qmailctl start

tail -f /var/log/qmail/qmail-smtpd/current