[Mailman-Users] best way to reconfirm a list

I looked through the list admin manual and didn't see anything about reconfirming a list. Is there an easy way to have mailman reconfirm a list?

I have a list that has been in use for 5+years and all of a sudden maps is saying I'm hitting a spam trap. The list has not been added to in at least 3+years. Actually I have 2 lists that maps claims is hitting spam traps, but neither list has been added to in at least 3+ years. New subscribers are asked to subscribe to a yahoo group instead.