Your list health grade

Two grades, before and after

Every report shows two grades:

• The list you uploaded. This is how healthy your list was before cleaning.
• Your clean list. This is the file we hand back, which keeps only Safe and Major provider addresses.

So D → A means your list had problems and the file you download doesn't.

How the grade is worked out

Grade	Rule
A	Under 2% would bounce, and under 10% risky or unconfirmed
B	Under 5% would bounce, and under 20% risky or unconfirmed
C	Under 10% would bounce
D	Under 20% would bounce
F	20% or more would bounce

"Would bounce" is the share of addresses in the Will bounce group. "Risky or unconfirmed" is Risky plus Unknown.

Projected bounce rate

This is the share of your uploaded list we're confident would hard-bounce if you sent to it today. Most email platforms start to worry once hard bounces go above a few percent of a send, so a high number here is worth acting on before you hit send.

Compared with last time

If you've cleaned a list before, your report also shows how this one compares with your previous clean: the grade change, the bounce rate change, and whether the list grew or shrank.