warmup_stats

What it does

The honest scoreboard. For each mailbox you get where it is in the ramp, how many warmup threads went out and — the number that actually matters — how many replies came back in.

Sent-versus-received is the diagnostic. A mailbox showing high sends and zero inbound is not warming; it is talking to itself. In practice that pattern means the inbound path is broken, and no amount of additional volume will fix it.

This is also where you confirm the warmup pool is healthy. Warmup needs at least one active pool account to have anywhere to send.

Read it weekly rather than daily. Warmup progress is slow by construction, so day-to-day movement is noise, and checking constantly tends to produce the impulse to intervene — usually by raising a limit, which is the one action guaranteed to make things worse. Week over week, the reply count should be climbing alongside sends.