---
title: "Guide to Connect Existing Domains"
description: "Guide to Connect Existing Domains"
url: https://help.inboxkit.com/en/articles/16-guide-to-connect-existing-domains
collection: "Domain Management"
updated: 2026-11-02
language: en
---

# Guide to Connect Existing Domains

Guide to Connect Existing Domains

InboxKit allows you to easily connect domains you already own from any registrar such as Namecheap, GoDaddy, Porkbun, Hostinger, IONOS, Dynadot, or others. Once connected, InboxKit will automatically configure all DNS records (SPF, DKIM, DMARC, MX) on your behalf.

This guide walks you through the entire process:  
**Connect → Update Nameservers → Verify → Activate**

* * *

## 🔗 **How to Connect Your Existing Domains to InboxKit**

You can connect your domains one-by-one OR upload up to **250 domains** via CSV. Once added, InboxKit will generate nameservers that you must update in your domain registrar.

* * *

## ✅ **Step 1: Go to Domains → Connect Existing**

Inside InboxKit:

1.  Go to **Domains** in the sidebar
    
2.  Click **Connect Existing**
    

You’ll see two options at the top-right:

-   **Connect Existing**
    
-   **Buy Domain**
    

Click **Connect Existing** to proceed.

* * *

## ✍ **Step 2: Add Your Domains**

You can add existing domains using:

### **Option A: Manual Entry (One by One)**

-   Type your domain into the field
    
-   Press **Enter**
    
-   Repeat for multiple domains
    
-   Click **Connect**
    

### **Option B: Paste List (Multiple Domains at Once)**

-   Paste 2–50 domains at a time
    
-   Each must be on a new line
    
-   Click **Connect**
    

### **Option C: Bulk Upload via CSV (Up to 250 Domains)**

-   Click **Upload CSV File**
    
-   Upload a file containing up to 250 domain names
    
-   Click **Connect**
    

> ⚠ **Note:** InboxKit allows a maximum of **250 non-connected domains at once**.  
> You can re-add removed domains any time.

* * *

## 🛠 **Step 3: Get Nameservers Generated by InboxKit**

Once you click **Connect**, InboxKit will generate **two nameservers** for each domain, for example:

```javascript
ns1.inboxkit-dns.com  
ns2.inboxkit-dns.com

```

These nameservers are unique to InboxKit’s DNS automation system.  
You MUST update these in your registrar within **12 hours**, otherwise the domain will auto-expire and must be re-added.

* * *

## 🌐 **Step 4: Update Nameservers in Your Domain Registrar**

Go to the domain provider where your domain was purchased (e.g., Namecheap, GoDaddy, etc.).

Replace the existing nameservers with the two provided by InboxKit.

Example:

**Old nameservers (to delete):**

-   [dns1.registrar.com](http://dns1.registrar.com)
    
-   [dns2.registrar.com](http://dns2.registrar.com)
    

**InboxKit nameservers (to add):**

-   [ns1.inboxkit-dns.com](http://ns1.inboxkit-dns.com)
    
-   [ns2.inboxkit-dns.com](http://ns2.inboxkit-dns.com)
    

Click **Save** or **Update** in your registrar.

> ⏳ **Propagation Time:**  
> It may take **24–48 hours** for nameserver changes to propagate fully.

* * *

## 🔁 **Step 5: (Optional) Enable Auto-Sync Nameservers**

InboxKit lets you directly connect your domain registrar so nameservers can sync automatically.

To use auto-sync:

1.  Click **Enable Auto-sync**
    
2.  Sign in with your registrar credentials. Auto-sync currently supports these registrars: Porkbun, GoDaddy, Spaceship, Dynadot, Name.com, and Namecheap.
    
3.  InboxKit will automatically update nameservers when new domains are added
    

Domains at any other registrar need manual nameserver updates at the registrar, as described in Step 4.

This is ideal for:

-   Agencies
    
-   High-volume senders
    
-   Users managing dozens or hundreds of domains
    

* * *

## 🔎 **Step 6: Verify Domain Status (Propagation Check)**

Once nameservers are updated:

1.  Scroll to the **Connected Domains** section
    
2.  Find your domain
    
3.  Click **Check**
    

Statuses include:

-   **Not Connected** → Nameservers not yet updated
    
-   **Checking** → Verification in progress
    
-   **Active** → Nameservers successfully propagated
    

Only **Active** domains can be used for mailbox creation.

* * *

## 🎉 **Step 7: Domain Becomes Active → Ready for Mailboxes**

Once your domain reaches **Active** status:

-   SPF, DKIM, DMARC, MX will be automatically configured by InboxKit post mailbox creation
    
-   No additional manual setup is required
    
-   You can immediately start creating **Google Workspace or Microsoft 365 mailboxes**
    

* * *

## 📌 **Important Notes**

-   Nameservers **must** be updated within **12 hours** of connecting the domain
    
-   InboxKit automatically configures DNS once domain becomes Active post mailbox setup
    
-   You may re-add expired domains anytime to regenerate nameservers
    
-   You can bulk-check statuses using **Bulk Sync → Select All Not Connected**
    

* * *

## 🎉 You're All Set!

Your existing domains are now connected to InboxKit.  
Once they turn **Active**, they are fully ready for mailbox creation, warm-up, and sequencer export.

## Related

- [How to Buy a New Domain in InboxKit: A Step-by-Step Guide](https://help.inboxkit.com/en/articles/2-how-to-buy-a-new-domain-in-inboxkit-a-step-by-step-guide.md)
- [How to setup domain forwarding in InboxKit?](https://help.inboxkit.com/en/articles/17-how-to-setup-domain-forwarding-in-inboxkit.md)
- [How to setup DMARC & Catch-All Email in InboxKit?](https://help.inboxkit.com/en/articles/18-how-to-setup-dmarc-and-catch-all-email-in-inboxkit.md)
- [How to add custom DNS for any domain in InboxKit?](https://help.inboxkit.com/en/articles/19-how-to-add-custom-dns-for-any-domain-in-inboxkit.md)
- [How to delete a Domain in InboxKit?](https://help.inboxkit.com/en/articles/21-how-to-delete-a-domain-in-inboxkit.md)