When should I consider getting a dedicated IP?

Someone suggests you get a dedicated IP for "better deliverability" and it sounds like an obvious upgrade. But if you're sending 10,000 emails a month and you switch to a fresh dedicated IP, your deliverability will almost certainly get worse before it gets better. A dedicated IP starts with zero sending reputation, and mailbox providers are cautious about IP addresses they've never seen before.

A dedicated IP is an IP address assigned exclusively to your sending domain. Your reputation is entirely your own, built from your own sending history. That's genuinely useful once you've earned a strong reputation and want to protect it from other senders' mistakes. But it's a liability when you're new to it. The warm-up process typically takes four to eight weeks: you start by sending only to your most engaged subscribers in small batches, gradually increase volume, and let mailbox providers observe your engagement signals before you scale up. Rushing the warm-up is a fast way to trigger spam filters.

Volume and consistency are the two factors that matter most. Most ESPs recommend dedicated IPs for senders above 50,000 to 100,000 emails per month who send on a regular schedule. The "regular schedule" part is as important as the volume. If you send 300,000 emails in December and then go quiet until March, your dedicated IP's reputation will degrade between sends, and you'll face deliverability headaches when you ramp back up. Consistent sending patterns are what let mailbox providers build a reliable picture of your IP's behavior.

There's also a strong case for dedicated IPs when you need to separate transactional and promotional mail. Password resets, receipts, and account notifications are time-sensitive messages your customers expect. If a promotional campaign generates a complaint spike, that could delay those transactional sends if both live on the same IP. Many ESPs let you route transactional mail through separate infrastructure even if you stay on a shared promotional IP, which gets you most of the benefit without the full warm-up commitment.

Before requesting a dedicated IP, ask your ESP whether your account qualifies and what their recommended warm-up schedule looks like. They can see your actual sending patterns and engagement rates, so their guidance is worth more than any general threshold. If they say you're not ready, you're not ready, and pushing anyway creates more problems than staying on a well-managed shared pool.