The times that I have seen this happen, it was an intermediate server that had the problem. You will have to get copies of some of these messages will *ALL* the headers showing to track it down. You have to look at the various Received headers to see the route the mail took. At 1:44 PM +0100 3/31/06, Eggleston Scott wrote > >Hi, > >Can anyone help me with this problem. > >Some of our users are experiencing problems with certain lists >whereby old messages are periodically being resent to the list >subscribers. > >This is causing many problems as you can imagine especially if >the communications are of high importance. > >Is there any setting on the List Server that can be modified to prevent >this ? > >Any help appreciated. > >Rgds > > > >Scott Eggleston > >Senior Systems Engineer > >Systems & Applications > >NHS Connecting For Health (NPfIT) > >0113 397 3409 > >[log in to unmask] <mailto:[log in to unmask]> > >www.connectingforhealth.nhs.uk <http://www.cfh.nhs.uk/> > > > > > >This e-mail is confidential and privileged. If you are not the intended recipient please accept our apologies; please do not disclose, copy or distribute information in this e-mail or take any action in reliance on its contents: to do so is strictly prohibited and may be unlawful. Please inform us that this message has gone astray before deleting it. Thank you for your co-operation. -- Some minds are like concrete: thoroughly mixed up and permanently set. Bill Verity - 814-865-4758 Fax: 814-863-7049 215A Computer Building - Information Technology Services, Penn State University At the office - on my Mac, of course ;-)