Being curious, too, I checked and found this: "If you are using Outlook 2003 in a Microsoft Exchange environment you have the option to recall e-mail messages that you have sent to other Outlook clients in the Exchange environment." http://www.onlinecomputertips.com/office/message_recall.html I'd have thought that it would only affect addresses in that environment. Is this another case of M$ presuming that if you're not in their environment you don't exist? -- Russ > On Wed, 18 Apr 2007, Helmke,Richard A wrote: > > I just saw the aftermath of someone attempting to "unsend" a message to > > a LISTSERV list and all the bounce back of "message recall failure" back > > to the list. What a mess. I have now added a CONTENT FILTER for the > > "message recall failure", but now am wondering if there is a way to > > inhibit this kind of Exchange command being distributed by LISTSERV. Any > > other things I should be filtering from Exchange? > > I don't keep up with all the "features" of all the mail systems, only the > ones that cause problems on my lists. I've never encountered this. What > is it, and how is it supposed to work? > > As one really can't "unsend" what has been sent, especially once delivered, > any more than one can "unsay" what one has said and been heard by others, > what is this supposed to do? Delete the item from the recipients email > inbox? What if it has alrady been read? Saved to some other file/folder? > > Douglas Winship [log in to unmask] St. Thomas University http://www.stu.ca/~hunt/