varun sharma writes:

1. The mail delivery will be stopped for moderators as well as list owners. So the moderators should also not receive any "add request pending" email during the vacation period.

Moderators and owners need to have their vacations treated differently from other users, especially for mail forwarded from the -owner alias. ("Hi, this is your friendly ISP. You have 24 hours to fix the backscatter or we will consider you in breach of our AUP and terminate your account.")

One possibility would be to switch notifications to "batch" (once a day, once every couple of days) and send them as a digest rather than individually. This might also be a good possibility for users (but the relevant batching period might be longer).