What's new

Customize your sender identity confirmation email

Agathe Brusset · 2 min read · October 30th, 2025

Sender identities are a really useful feature when you're managing the email for multiple brands or clients.

Instead of going through the process of adding SPF, DKIM and other records to the domain's DNS, you can simply verify an email address instead, allowing you to send emails from one of your existing verified domains, on behalf of another.

If you have a Starter plan or above, you have access to Sender identities, and you can now check out our redesigned Sender identity builder with additional customization options. But the biggest new improvement to sender identities is that, if you have a Professional plan or above, you now have the ability to design your sender identity verification email.

Here's what's new.

Customizing sender identities

In the new Settings tab, you'll find 3 customization options: Confirmation link, Confirmation email (Professional plans and above), and Confirmation sender details.

The Sender identity settings page in MailerSend.
  • Confirmation link: Customize the link added to the sender identity verification email with your domain. You can do this by adding a CNAME record to your domain's DNS zone.

  • Confirmation email (Professional plans and above): Instead of sending clients an unbranded email that doesn't match your other templates, you can now customize the confirmation email and success message page with your own branding and design. This will allow you to keep your communications more consistent and professional. You can adjust:

    • Logos

    • Fonts

    • Background colors

    • Content styles and colors

    • Button settings and styles

The Sender identity confirmation email builder.
  • Confirmation email details: Easily customize the sender details for identities you create from any domain. Add the details once, and the settings will be applied for all sender identity emails.

The new Sender identity builder is ready for you to try

Check out our help guide on creating and managing sender identities to get started. And if you have a Professional plan, be sure to head to settings to customize your email.