vpopmail killing the server

This server has been experiencing high loads with no apparent reason and a quick look makes qmail look responsible for this.

On 2006-08-13 an Interworx automatic update:

          Name  Version           Type    Status
  1.     qmail   1.03-209.rht90.iworx             os

seems to have changed something and it is causing very high server loads, I have had to kill several never-ending concurrent vpopmail (qmail-smtpd) processes but these processes reappear after just a few minutes.

I thought it could be someone trying to use SMTP so I have checked the mail queue but everything looks fine there, so I came to the conclusion this issue could be related to this update.

Any Ideas ???

Please disregard my last message, it seems the issue was solved after clearing mail queue.

Thank you.