What do I do when I see Grey or Pristine account types?
Pristine: If you’re hitting pristine traps this typically indicates you have a bad data partner; they are not providing legitimate addresses. You will want to work with that provider to fix it or find another.
Grey: it is possible to have inactive addresses on your list for so long and to ignore bounces such that email addresses that were once good are now operated as “grey” spam trap (rather than pristine). You will want to work to identify those addresses and clean out your list.