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Configuring a domain for email sending only

Learn how to verify and connect your domain to enable send-only custom email addresses.

jay_d2-1572877644-modified
Written by: Jay Douglas
Last updated: 14 Nov., 2025
   This feature requires a Client Engagement seat.
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Email sending allows you to use a custom email address to send B12 emails, including form submission reply confirmations, invoices, and Email Marketing emails. To set up email sending, you'll need to connect and verify your domain. 

Automatically configuring your domain

1. In the left sidebar main menu, go to domains Domains.

2. Add a new domain by clicking Add domain or choose the existing domain you'd like to set up sending for.

3. Check off the option to Enable email sending from this domain, then click Sync Domain.

Tip: Choose this option only if you already have an existing email provider for your domain.

If you do not have an existing email provider, follow these instructions to set up email forwarding and create a new custom email address.

4. Log in to your domain provider to automatically update your DNS settings.

If your provider isn’t listed or the automatic setup doesn’t work, follow the manual connection steps.

Once your settings are updated, domain verification usually completes within 24–48 hours.

5. After verification, add or update at least one Team member’s email address to match your connected domain. The email address must end with your connected domain name.

Manually configuring your domain

If automatic setup isn’t available, follow these steps to connect your domain manually.

Scroll down to the Email sending setup instructions to view the unique DNS records you'll need to add to your domain settings.


Next, you'll need to follow these steps to get your custom email address up and running:

1. Log in to your domain host.

2. Find the DNS settings for the domain you would like to use.

3. Add the 2 TXT records from your setup instructions to your DNS settings:

Type: TXT

Host/Name: (usually @)

Value: v=spf1 include:mailgun.org ~all

Type: TXT

Host: In most cases, use only the text in the "Name" field before the second period.

Value: Paste the unique value for your account.

Important: If you already have a TXT record with v=spf1, you will need to edit your existing record using the following instructions.

Changes to DNS settings may take up to 48 hours to take effect. Once verified, your Email sending setup card will display Configured next to each TXT record. You can then create custom send-only email addresses for your domain.