Warmup emails sent
These are warmup emails that have "originated" from your mailbox and sent to another mailbox in the warmup pool
Landed in inbox
These are the number of warmup emails "originated" from your mailbox that landed in the primary inbox of another mailbox in the warmup pool
Saved from spam
These are the number of warmup emails "originated" from your mailbox that landed in the spam of another mailbox in the warmup pool and were rescued and moved to the primary inbox of the other mailbox
Emails received
These are warmup emails that have "originated" from another mailbox in the warmup pool and sent to your mailbox
Replied emails
You can see this as the pink bar in the bar chart that covers the replies from other mailboxes to emails that have originated from your mailbox