Francoise, We will be upgrading within a week or two to version 14.4, so hopefully that will solve the problem. Thank you! Our Listserv server has dual Pentium 4 3 Mhz processors, so perhaps that's the "problem"! Melissa -----Original Message----- From: LISTSERV site administrators' forum [mailto:[log in to unmask]] On Behalf Of Francoise Becker Sent: Tuesday, January 24, 2006 3:59 PM To: [log in to unmask] Subject: Re: [LSTSRV-L] Occasional duplicate message IDs from command responses On 23 Jan 2006 at 14:06, Kenny, Melissa S wrote: > We are having a problem recently when sending commands to Listserv > (version 1.8e.) This is happening with commands which are answered > with > 2 messages, one to confirm the command and notify you that the results > are being sent, and the other being the actual results; e.g. "info > refcard" or "review." Occasionally, it seems as if Listserv is > assigning the same message ID to both messages. When this happens, > our Exchange 2000 system is "helpfully" removing one of the messages > (usually the actual results, not the confirmation message, > unfortunately.) You may be a victim of a fast processor ;-) In LISTSERV 14.3, the LISTSERV-generated Message-ID: header was extended to prevent such duplication. I recommend upgrading. There are a lot of useful things that have been fixed and added since 1.8e. -- Francoise Becker Are you subscribed to an innovative LISTSERVr e-mail list? Nominate it for the "LISTSERV Innovation Award" by Feb. 1, 2006 at: http://www.lsoft.com/news/choiceawards.asp