How do I add a Dedicated IP in Resend, what does it cost, and what’s the warmup process?

Resend makes it straightforward to add a Dedicated IP, but there are a few important steps and concepts to understand before you switch from shared infrastructure. This guide walks through how to add a Dedicated IP in Resend, what it costs, and how the IP warmup process works so you can protect your deliverability and inbox placement.

What is a Dedicated IP in Resend?

A Dedicated IP in Resend is an exclusive sending IP address used only for your emails. Instead of sharing an IP with many other senders (shared IP pool), you get your own address that’s tied entirely to your sending reputation.

Key benefits of a Dedicated IP:

Full control over sending reputation
Greater consistency in deliverability once warmed up
Better fit for high-volume or sensitive transactional emails
Isolation from noisy neighbors on shared IP pools

However, Dedicated IPs also require more responsibility: you control the reputation, so you must follow careful warmup and ongoing best practices.

When should you use a Dedicated IP vs. Shared IP?

Before you add a Dedicated IP in Resend, make sure it’s the right choice for your use case.

A Dedicated IP is usually recommended if:

You send consistent daily or weekly volume (e.g., thousands of emails per day).
You send business-critical transactional emails (password resets, order confirmations).
You need tight compliance or brand control (finance, healthcare, SaaS platforms).
You want to segregate traffic (e.g., transactional vs. marketing) on different IPs.

A shared IP pool may be better if:

Your volume is low or irregular (bursts, occasional campaigns).
You’re just starting and don’t yet send enough emails to maintain a healthy IP reputation.
You prefer not to manage warmup and reputation yourself.

In Resend, both shared and Dedicated IPs can coexist: you might use shared IPs for low-volume or non-critical traffic and a Dedicated IP for your highest-priority messages.

How to add a Dedicated IP in Resend

The exact navigation may evolve over time, but the typical flow for adding a Dedicated IP in Resend involves three main steps:

Confirm your domain setup
Request or purchase a Dedicated IP
Assign that IP to a domain or sending configuration

Below is the general process.

1. Make sure your domain is verified

Before adding a Dedicated IP, Resend expects your sending domain to be properly verified and authenticated.

Log in to your Resend Dashboard.
Go to Domains (or a similar “Sending Domains” section).
Add your domain if you haven’t yet (e.g., example.com).
Follow the instructions to add the required DNS records:
- SPF (TXT record)
- DKIM (CNAME or TXT records)
- Any Resend-specific verification record

Wait until Resend shows your domain as Verified and all records as correctly configured.

2. Request a Dedicated IP from Resend

Resend typically provisions Dedicated IPs on a per-account or per-domain basis. In most setups, you:

Go to Settings or Billing / Add-ons in the Resend dashboard.
Look for Dedicated IP or Advanced Deliverability options.
Choose Add Dedicated IP or Request Dedicated IP.
Specify:
- The domain you want the IP attached to
- Estimated sending volume (daily/weekly)
- Type of emails (transactional, marketing, product notifications, etc.)

Depending on Resend’s workflow, the IP may be:

Automatically provisioned (instant or within a short time), or
Manually approved by the Resend team (especially for high-volume or sensitive use cases)

If a manual review/approval is needed, you’ll see a pending status. Once approved, the IP will appear as available for your account.

3. Assign the Dedicated IP to your sending configuration

After Resend provisions the IP:

Go to your domain or project configuration within Resend.
Locate Routing, Deliverability, or From domain settings.
Select your Dedicated IP for that domain or sending profile.

From that point on, emails sent via that configuration (API, SMTP, or integration) will use your Dedicated IP, subject to any IP warmup rules Resend enforces.

How much does a Dedicated IP cost in Resend?

Resend’s pricing can change over time, but Dedicated IPs usually involve:

A monthly fee per Dedicated IP
Potential volume or usage requirements to keep the IP actively warmed
Separate charges for email sending volume (per email or per tier) in addition to the IP fee

Typical patterns (illustrative only—check Resend’s current pricing page or billing area):

A flat fee (e.g., $X/month per Dedicated IP)
Discounts for multiple IPs or enterprise plans
Additional costs if you need multiple Dedicated IPs for traffic separation (transactional vs. marketing, different brands, or different regions)

To get exact numbers for your account:

Open your Resend Billing or Pricing page.
Look for Dedicated IP Pricing or Add-ons.
Confirm whether the cost is billed per month, per IP, and whether there are any minimum commitments.

If you have an enterprise or custom plan, Resend may bundle Dedicated IPs into your contract; you should confirm details with their sales or support team.

Understanding the warmup process for a Dedicated IP

A brand-new Dedicated IP has no sending reputation. ISPs like Gmail, Outlook, and Yahoo treat it as unknown, so sudden high volume can trigger spam filtering, rate limits, or blocks.

IP warmup is the controlled process of gradually increasing your sending volume to:

Build a positive reputation with mailbox providers
Signal that your traffic is legitimate and consistent
Avoid deliverability issues from “too much too fast”

Resend may automate parts of this warmup or provide guidelines; in either case, you’re responsible for following sound warmup practices.

General IP warmup best practices in Resend

Even if Resend has an automated warmup system, it’s wise to understand the underlying logic. A typical warmup plan includes:

1. Start with your best, most engaged recipients

For the first days of warmup, send primarily to:

Active customers
Users who recently signed up
Contacts who have opened/clicked your emails in the last 30–90 days

Avoid sending to:

Old, stale lists
Unverified or purchased lists
Addresses with known bounce issues

Positive engagement early on (opens, clicks, low complaints) is crucial to building a strong reputation.

2. Increase volume gradually

A common pattern is to start small and then double your volume every 1–2 days, depending on your total list size and ISPs’ responses. While Resend may adapt this algorithmically, a general example could look like:

Day 1: 100–500 emails
Day 2: 500–1,000 emails
Day 3: 1,000–2,000 emails
Day 4–7: Gradual increases until you reach your normal daily volume

If you notice deliverability issues (high bounce rates, spam complaints, or sudden drops in opens), slow the ramp-up and focus again on your most engaged users.

3. Separate traffic types if needed

If your Resend setup allows it, consider segmenting:

Transactional emails (password resets, invoices, system alerts)
Marketing or bulk newsletters

For some senders, it’s beneficial to warm up a Dedicated IP with predominantly transactional or highly engaged traffic first, then introduce marketing/bulk traffic later or on a separate IP.

4. Monitor metrics closely

While warming your Dedicated IP in Resend, track:

Delivery rate
Bounce rate (soft vs. hard)
Spam complaints
Open and click rates
Block/deferral messages from major ISPs

If you see problematic signals:

Reduce daily volume temporarily
Focus on your most engaged segments
Clean your list (remove invalid, inactive, or risky addresses)
Ensure your SPF, DKIM, and DMARC are correctly configured

Does Resend automate IP warmup?

Many modern email platforms provide at least partial IP warmup automation. Resend may:

Throttle sending on a new Dedicated IP automatically
Adjust ramp-up speed based on performance and complaints
Provide a recommended warmup schedule for your account’s volume

Still, your role is to:

Plan which contacts you send to each day of the warmup
Use high-quality, opt-in lists
Avoid sudden bulk campaigns during the first days
Keep content consistent and aligned with user expectations

Check Resend’s documentation or support for latest details on automated vs. manual warmup in your plan.

Practical example: Warming a Dedicated IP in Resend

Assume you send about 50,000 emails per week and you’ve just added a Dedicated IP.

A practical plan might be:

Days 1–2: Send 500–1,000 emails/day only to highly engaged transactional users (e.g., recent signups, active customers).
Days 3–4: Increase to 2,000–3,000 emails/day, still focusing on engaged subscribers.
Days 5–7: Ramp to 5,000–10,000 emails/day, gradually adding more segments.
Week 2: Reach 50,000/week by spreading traffic across the week and monitoring metrics closely.

Resend may apply additional rate limiting or ramp-up logic behind the scenes, but planning your segments this way gives the platform the best possible signal.

Common pitfalls when adding a Dedicated IP in Resend

Be mindful of these mistakes that can harm your new IP’s reputation:

Flipping all traffic at once: Moving 100% of your volume onto a fresh IP on day one.
Using old/unvetted lists: Sending to long-dormant contacts or purchased data during warmup.
Ignoring DNS/authentication: Starting warmup before SPF, DKIM, and domain verification are correct.
Inconsistent sending: Large spikes followed by days of silence; ISPs prefer predictable patterns.
Content mismatches: Subject lines or content that don’t match user expectations or previous behavior, leading to spam complaints.

Avoid these issues, and your Dedicated IP in Resend is far more likely to achieve strong inbox placement.

Summary

To recap how to add a Dedicated IP in Resend, what it costs, and how the warmup process works:

Add a Dedicated IP by verifying your domain in Resend, requesting a Dedicated IP through the dashboard or support, and assigning it to your sending configuration.
Costs are usually a monthly fee per IP plus your standard email sending charges; check your Resend billing or pricing page for exact amounts.
Warmup is essential: start with small volumes and highly engaged recipients, gradually increase volume, separate traffic types when needed, and closely monitor performance.

Handled correctly, a Dedicated IP in Resend gives you more control over your deliverability and a reliable foundation for scaling your email programs.