One IP, one reputation, no shared risk.
Each Sendbox account gets an IP address that belongs to it exclusively. That means your inbox placement rises and falls with your own sending habits, never with whatever a stranger sharing your plan did last week.
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A reputation that answers to you alone.
Nothing another sender does can touch your deliverability. Full stop.
Dedicated IPs are baked into the infrastructure from day one, not something sold separately as an upgrade.
A hash-based system permanently pairs each mailbox with one IP, with no random rotation involved.
Accounts can hold several dedicated IPs at once, each with its own permanently assigned set of mailboxes.
Every account gets its own IP, no exceptions.
As soon as your account exists, Sendbox provisions an IP address that's yours and only yours, no sharing, no pooling with anyone else.
A hash-based system permanently ties each mailbox to one specific IP. Because that mailbox always sends from the same address, the reputation signals it builds stay consistent over time.
Clean sending habits earn good deliverability, and sloppy lists earn bad deliverability, but either outcome traces back to your own practices, never to a stranger's spam run.
Assign a dedicated IP to each client, so when one of them tries an aggressive angle, none of your other clients feel it.
Security teams often need to trace exactly which IP sent which email. Sticky IP assignment makes that audit trail straightforward to produce.
Running dozens of mailboxes at once? Each one maps permanently to a single IP, letting reputation build steadily instead of resetting.
Skip the shared IP, skip the shared risk.
Dedicated IPs on every tier, not reserved for enterprise
Most cold email platforms gate dedicated IPs behind an enterprise tier, or skip the feature altogether. Sendbox includes them on every plan from Starter through Power, because reputation isolation shouldn't hinge on how big your budget is.
Shared IPs are a gamble with your inbox placement
On shared infrastructure, your emails go out from the same IP as hundreds of other accounts. Let one of them get blacklisted for spam, and suddenly your carefully written outreach ends up in spam too, through no fault of your own, just bad luck sharing an address with someone who did the wrong thing. Dedicated IPs remove that risk from the equation entirely.
Multi-IP support with permanent mailbox mapping
An account can hold multiple dedicated IPs, and a sticky hash system permanently maps each mailbox to one of them, keeping reputation signals steady over time. Sendbox deliberately doesn't rotate IPs automatically: a consistent mailbox-to-IP pairing gives ESPs a clean, predictable pattern to evaluate, which works in your favor.
Got questions? We've got answers.
Still stuck? Talk to us →Yes, every plan includes a dedicated IP at no extra charge. It's part of the core infrastructure rather than something you pay more to unlock.
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