tcpserver error in /var/qmail/log/smtpd

[richard sonnier]

I have qmail 1.51 installed on redhat 7.3
It is working fine.
I keep getting this error message in /var/qmail/log/smtpd. It is continuously putting out this. 
Fills up 98K in about 20 minutes. 
@400000003e7ad42f1410b224 tcpserver: fatal: unable to bind: address already used
@400000003e7ad43015da7d74 tcpserver: fatal: unable to bind: address already used
@400000003e7ad43117a375d4 tcpserver: fatal: unable to bind: address already used
@400000003e7ad432196e855c tcpserver: fatal: unable to bind: address already used
@400000003e7ad4331b38a2b4 tcpserver: fatal: unable to bind: address already used
@400000003e7ad4341d019b14 tcpserver: fatal: unable to bind: address already used
@400000003e7ad4351eca9b44 tcpserver: fatal: unable to bind: address already used
@400000003e7ad43620947634 tcpserver: fatal: unable to bind: address already used
@400000003e7ad437225f5eac tcpserver: fatal: unable to bind: address already used
@400000003e7ad43824294d24 tcpserver: fatal: unable to bind: address already used
@400000003e7ad43925f143b4 tcpserver: fatal: unable to bind: address already used
@400000003e7ad43a27bc2c2c tcpserver: fatal: unable to bind: address already used
@400000003e7ad43b29860eec tcpserver: fatal: unable to bind: address already used
@400000003e7ad43c2b501ca4 tcpserver: fatal: unable to bind: address already used
@400000003e7ad43d2d1b245c tcpserver: fatal: unable to bind: address already used
@400000003e7ad43e2ee36524 tcpserver: fatal: unable to bind: address already used
@400000003e7ad43f30ac3a5c tcpserver: fatal: unable to bind: address already used
@400000003e7ad44032772e8c tcpserver: fatal: unable to bind: address already used

Anyone have an idea.
Richard sonnier