I tried subscribing to the list on Monday this week. No confirmation email arrived. On the assumption that it may have been caught in a spam filter by the Microsoft Exchange server work uses, I waited for a few days. I’ve had two spam report emails since then and the confirmation email has not been in either, so I think that it has been lost somewhere earlier in the delivery path. This may be a Microsoft Exchange problem; I will try a different email address to get another data point.