How to Add a Custom Domain in SendGrid

Updated on:

May 12, 2026

By:

Use this interactive demo to learn how to authenticate and set up a custom domain in SendGrid.

Quick summary

Adding a custom domain in SendGrid involves navigating to Sender Authentication and completing domain verification by adding the provided DNS records to your host. Once verified, your custom domain is instantly authenticated, improving email deliverability and sender trust.

Steps

Go to the left-side panel and click Settings.
Choose Sender Authentication from the list of options.
Tap Authenticate Your Domain to proceed.
Click the DNS Host menu and choose your current host from the available choices.
Select whether you want to brand the tracking links for the custom domain by choosing the Yes or No radio button.
Tap Next to continue.
Enter your custom domain into the From Domain input field, then open Advanced Settings to configure additional preferences.
Click Next to proceed.
Copy each provided DNS record and paste them into the DNS section of your active host.
Confirm all required records have been added, then tap Verify to complete authentication and enable your custom domain instantly.

📌 Why this matters

Setting up a custom domain in SendGrid is essential for improving email deliverability, sender reputation, and brand credibility. Authenticating your domain through Sender Authentication signals to inbox providers that your emails are legitimate, reducing the risk of being flagged as spam. Branded tracking links tied to your custom domain further reinforce trust with recipients and improve click-through rate attribution. This process is a foundational step for any business serious about reliable, professional email delivery at scale.

Your product deserves an interactive demo

Start free

How to Create a Simple Email Signature in SendGrid

How to Test the Spam Scores in SendGrid

How to Manage Contact Groups in SendGrid