A dedicated IP is an email-sending address used exclusively by one sender, rather than being shared with other senders on the same email platform.
The Trade-Off Most Stores Never Actually Need to Make
Setting up a dedicated IP email sending address sounds like an obvious upgrade for deliverability, but the reality is more nuanced. What is a dedicated IP solving comes down to isolation: giving a sender full control over its own sending reputation, since no other sender’s behavior can affect it.
A shared IP, by contrast, is used by many senders at once, which means one sender’s poor practices, sloppy list hygiene, aggressive sending, can occasionally drag down deliverability for everyone else using that same IP, through no fault of their own.
That isolation sounds like an obvious upgrade, but dedicated IP vs shared IP isn’t a simple better-or-worse comparison. A dedicated IP starts with no sending history of its own, which means it has to be warmed up gradually before inbox providers trust it, a process that can take weeks.
A shared IP, used by a reputable platform sending consistent, well-behaved volume from many senders, often has an established reputation already, which can actually mean better deliverability out of the gate for a smaller sender than starting a dedicated IP from zero.
When Do You Need a Dedicated IP
When do you need a dedicated IP is really a volume question. Isolation only pays off once a sender is pushing enough consistent volume that their own sending behavior is what determines their reputation, and building that reputation on a dedicated IP becomes worth the setup effort.
A dedicated IP for ecommerce specifically tends to make sense somewhere in the range of very high, consistent daily send volume, well beyond what most small and mid-sized stores are sending. Below that threshold, a shared IP on a well-managed platform typically outperforms a dedicated IP that’s still building its own reputation from scratch, which is why a dedicated IP email setup is worth evaluating only once volume genuinely justifies it.
This topic connects closely to broader email authentication and sender reputation, both of which are covered in more technical depth on our Email Deliverability guide.
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