A dedicated IP is a sending IP address used by a single sender. Every email sent from it is yours, so its reputation reflects only your practices. That is the main attraction: you are not affected by other senders’ mistakes, and a well-run programme builds a reputation that belongs to you.
The same fact is also the risk. A dedicated IP has no history when you get it, so mailbox providers treat its first emails with suspicion until it builds one through a careful warm-up. And reputation needs regular, steady volume to stay meaningful. An IP that sends 2,000 emails one month and 80,000 the next looks erratic, and an IP that sends very little never gives providers enough data to trust it.
Dedicated IPs generally suit senders with large, consistent volume, often well into the hundreds of thousands of emails a month, and the discipline to keep lists clean. They are also used to separate streams, for example putting transactional mail on one IP and marketing on another so that a bad campaign can’t delay password resets. For lower or irregular volume, a well-managed shared IP usually performs better.
Remember that domain reputation now matters at least as much as IP reputation. Moving to a dedicated IP won’t rescue a domain with high complaint rates or poor authentication. Fix list quality, consent and authentication first; then consider a dedicated IP if your volume justifies it.
A national electronics retailer sends 1.2 million marketing emails a month at a steady pace. It moves to a dedicated IP and warms it up over four weeks, starting with customers who bought in the last 90 days. A local bakery sending 6,000 emails a month stays on a shared IP, where its small volume benefits from the pool’s established reputation.
You can connect your own sending service to MailNesto, such as Amazon SES with your own IPs, and give each sending server a warm-up plan whose daily cap rises step by step.