Queue Problem in qmail

Dear friend,

i am the new to qmail and i have one problem with my qmail.
my queue directories /var/qmail/queue/todo, /intd , /mess/*/
are continuously filling with unwanted mail entries. these mail entries are all stuck in the queue ,when i open the message in the queue it contain invalid email address in the Rcpt To and Mail From tag.

is my mailserver is open relay ? how to check this one? i;ve checked with cmd prompt as telnet servername 25
and tried mail relaying but its gives me an error as "sorry,the domain is not in my rcpthost"
is there any other way to check?

But,valid mail account in the server did not get any unwanted mails to their accounts!!!
here ,the message when i run ./qmail-qread in my server


14 Mar 2004 18:58:20 GMT #20231 975 <cvclwscvclws@BELLSOUTH.NET>
remote URL
14 Mar 2004 19:01:38 GMT #20254 819 <cvercver@YAHOO.COM.CN>
remote URL
14 Mar 2004 19:02:25 GMT #20255 889 <cverweecverwee@YAHOO.COM.JP>
remote URL
14 Mar 2004 18:58:42 GMT #20256 1535 <>
remote URL
14 Mar 2004 19:02:41 GMT #20279 1643 <>
remote URL
14 Mar 2004 18:55:24 GMT #20234 1680 <>
remote URL
14 Mar 2004 19:00:03 GMT #20257 903 <cvece1cvece1@CIS.NET>
remote URL
14 Mar 2004 19:02:07 GMT #20280 901 <cvermontcvermont@YAHOO.COM.JP>
remote URL
14 Mar 2004 18:55:47 GMT #20235 1622 <>
remote URL
14 Mar 2004 18:58:46 GMT #20258 1678 <>
remote URL
14 Mar 2004 18:57:41 GMT #20236 901 <cvc15cvc15@YAHOO.COM.JP>
remote URL
14 Mar 2004 19:02:43 GMT #20282 1676 <>
remote URL
14 Mar 2004 18:57:14 GMT #20237 867 <cvbjrcvbjr@EARTHLINK.NET>
remote URL


but my log message shows that the mail is not delivered to the above domains.

anybody have an idea.pls give the way to solve this problem

regards,
kcm