How many cold emails should I send with the starter plan, how many follow-ups, and how often should I change my 10,000 contacts?
It's really about how many cold emails you can send. Check the pricing page for the exact limits. For follow‑ups I recommend two total emails – one main email and one follow‑up. Send the follow‑up about 48 hours after the first email. As for changing your 10,000‑contact list when you hit the upper limit, it depends on how many contacts you have; I think around 5,000 is a good rule of thumb, but I'm not entirely sure.