The OK mechanism is somewhat resource intensive when used in large doses. Nothing to worry about for everyday use, but the day you do a renewal on a list with 500,000 subscribers (with 500,000 cookies that will all expire at the same time), things might be different. I expect that with 1.8c most people will switch to passive renewal, which doesn't require the recipient to do anything to stay on the list and also allows the elimination of all bounces. The main reason for using active renewal would be to select users who know the name of the list they are reading every day and who have enough technical skills to understand how to compose a new message and type the word CONFIRM followed by the name of the list. It really depends on the list, for instance if there are people on THIS list who don't know what LSTOWN-L is or how to send a new mail message, I would view auto-kicking as a feature. On a marketing or grant-related list where head count is everything, I would probably view any form of renewal as undesirable. Eric