Spec section 7.4.5: TimeToLive MUST be greater than the product of Retries and RetryInterval since the message was originally sent. Your comments: You cannot directly compare a dateTime quantity against a duration quantity. This does not directly compare. TimeToLive is compared to (Retries * RetryInterval) SINCE the message was originally sent. I believe this is correct. How would you prefer to say this? Regards, David Fischer Drummond Group.