Definition
A dedicated IP address is used exclusively by one sender for their email programme. Unlike a shared IP, where multiple senders share the same address and their collective behaviour determines reputation, a dedicated IP gives the sender complete control over their sending reputation. This control makes dedicated IPs the preferred choice for high-volume senders, established programmes with consistent sending patterns, and senders whose reputation has been damaged on shared IPs.
Dedicated IPs require proper warming — a gradual volume ramp-up over 2–6 weeks — to build reputation with mailbox providers. Sending large volumes from a cold dedicated IP will likely result in throttling or blocking.
When to Use a Dedicated IP
| Scenario | Recommended |
|---|---|
| Sending over 100,000 emails per month | Dedicated IP |
| Established sender with consistent volume | Dedicated IP |
| High engagement and low complaint rates | Dedicated IP |
| Low volume or inconsistent sending patterns | Shared IP |
| New sender without established reputation | Shared IP (warm up first) |
| Seasonal spikes in volume | Shared IP or pool |
Best Practices
- Warm up a dedicated IP over 4–6 weeks starting with low volumes
- Maintain a consistent sending cadence to preserve reputation
- Monitor blacklists and deliverability metrics closely
- Use a pool of dedicated IPs for very high volumes (100,000+ per day)
- Have a fallback shared IP for overflow during peak periods
Related Glossary Terms
IP Pool
An IP pool is a group of dedicated IP addresses that a sender uses collectively to distribute sending volume and manage reputation, providing flexibility for different types of email traffic and volume spikes.
Email Sending IP
Dedicated vs shared IP pools for email sending, IP reputation scoring, warmup process (4-8 weeks), rotation strategies, and IPv6 considerations for optimal deliverability.
Email PTR Record
PTR record (reverse DNS) for email sending. How PTR records work, why mailbox providers require them for dedicated IPs, format requirements, setup checklist, and troubleshooting.
Email Sender Infrastructure
Email sender infrastructure architecture covering sending domains, subdomains, dedicated versus shared IPs, tracking domains, and return-path domains.
Shared IP
A shared IP address is used by multiple senders simultaneously, where the sending reputation of everyone on that IP collectively determines deliverability outcomes for all users.
Frequently Asked Questions
No. A dedicated IP is only beneficial if you maintain good sending practices. Poor engagement, high complaint rates, or inconsistent volume on a dedicated IP will destroy your reputation with no buffer from other senders. Low-volume senders often perform better on reputable shared IPs.
Typically 4–6 weeks. Start with a few thousand emails per day and gradually increase while monitoring inbox placement. If engagement metrics dip, hold volume steady until they recover before increasing further.