How many mailboxes can I connect and warm up?
Connected mailbox limits by paid tier:
- Pro ($14.99/mo): Unlimited mailboxes
- Business ($29.99/mo): 200 mailboxes
- Enterprise ($69.99/mo): 400 mailboxes
- Ultimate ($199/mo): 800 mailboxes
- Free tier: 1 mailbox
There is no per-mailbox fee on any paid plan — you can warm up every connected mailbox at no additional cost. On the Pro plan at $14.99/month, you can connect 5, 50, or 500 mailboxes — there is no enforced cap. Email warmup runs on all connected mailboxes simultaneously. Your other constraint is your monthly email quota (e.g., 10,000/month on Pro), which is shared across all mailboxes and all sending activity (warmup + campaigns).