A new address that sends 200 emails on day one gets filtered. The same address sending 5, then 6, then 7 builds a record of normal behaviour, and the filters relax.
Buzzlist spaces sends about 20 minutes apart with a few minutes of jitter, only Monday to Friday, 8am to 4pm in the recipient's time zone. That is what a person at a desk looks like.
The cap stays at 20 cold emails per mailbox per day, always. More reach comes from more warmed senders, never from a higher cap.
