Any advice welcome

Dear Sir / Madam, I wondered if any one could help us we are a small company and recently sent out via our php list an invitation for an event. The event how know long passed and the mail out seems to be going out each month. We have stopped the message and even removed it but it is still going out. Do you have any advice how we can locate the message and stop it going out in the future ? Thank you, Stephen _____________________________________________________________ More contemporary art at http://www.art-online.org