I apologize for not having included my standard disclaimer in my previous posting: 1. If you are not happy with the code or documentation, you don't have to use it; you're free to write your own, and to make it better. 2. If you are not satisfied at the support I provide for either software or questions, you don't have to use it; I distribute the source code free of charge with the software, and you can always refer to it if you have unanswered questions, or make changes if you don't like the way it is working. As a list owner you are responsible for the configuration of your list. If you choose to introduce keywords in the list header that you have never heard about, fine, but you might want to consider the appropriateness of using the lack of current documentation as a justification for the use of options whose meaning is unknown to you. The keyword name, "Loopcheck", strongly suggests a relationship to loop checking and relevance to the problem you have described. As it stands, after reading your problem report I have come to the conclusion that this kind of error messages should be trapped unless your server is running 1.6d or older, noted with surprise that your server is indeed running 1.6e, double-checked the headers again, concluded that there must be some serious bug, carefully inspected the code, run several tests on my test LISTSERV, and failed to reproduce the problem. I thought about it for a while, REVIEWed the list to see how it was set up, and found that you had disabled loop checking. Bottom line, over 20 minutes of time wasted over a self-inflicted problem. The "Loopcheck=" keyword was implemented because a number of people were requesting it so aggressively that I decided it would be better to spend 10 minutes implementing it than hours answering their endless downpour of arguments, plus they were making local changes to turn it off on their server anyway - with the side-effect that lists where they did not want it turned off were also affected. Anyway to re-enable loop checking all you have to do is remove the keyword. Eric