Dedicated vs. Shared IPs: When the Switch Pays Off

A shared IP pools your sending reputation with every other sender on that IP. If everyone on the pool sends clean mail, that's fine — you benefit from an IP with an established history you didn't have to build yourself. The risk is that you don't control who else is on that pool, or what they send.

What you give up, and what you gain

A dedicated IP ties reputation entirely to your own sending behavior. Nobody else's complaint rate or blocklist hit affects you, but you also don't inherit any pre-built trust — a dedicated IP starts cold and has to go through warm-up before it can send at volume.

The volume threshold that actually matters

The volume threshold matters more than most advice suggests. At low, inconsistent volume, a dedicated IP can actually hurt you: mailbox providers want to see steady sending patterns to build a reputation profile, and a dedicated IP that sends a few hundred messages one week and nothing the next never accumulates enough history to be trusted.

As a rough guide, a dedicated IP starts to make sense once you're sending consistent volume — enough that a managed warm-up schedule can ramp it properly, and enough that your own sending behavior is what determines your reputation rather than noise. Below that, a shared IP with a good existing reputation is often the safer choice.