Understanding Sender Domain Settings in CRM Email Campaigns

What Are Sender Domain Settings?

Sender Domain Settings are a feature available when creating or scheduling email campaigns within your CRM. You can access these settings by navigating to Marketing → Emails → Campaigns. These settings determine which domain will be used to send your email campaign and verify that the From Email address matches that domain.

Email service providers require this alignment to properly authenticate messages. When the sending domain and sender email don't match, campaigns may fail to send or be marked as spam. Sender Domain Settings allow you to select the appropriate sending domain for each campaign, validate sender emails in real-time, and prevent campaigns from launching if domain compliance requirements aren't met. This campaign-level control helps reduce delivery problems and improves overall sending reliability.

Once a campaign is sent or scheduled, the selected sender domain becomes locked for that specific campaign.

Key Benefits of Sender Domain Settings

• Fewer Send Failures — Prevents campaigns from sending with mismatched or non-compliant sender domains, reducing hard errors at send time
• Better Deliverability — Ensures proper domain alignment, helping email providers authenticate messages and improving inbox placement rates
• Per-Campaign Control — Lets you choose the most appropriate sending domain for each campaign instead of relying on a single default
• Automatic Safeguards — Automatically adjusts supported sender emails and provides clear warnings when manual action is required
• Clear Visibility — Offers real-time validation and quick access to domain configuration, making issues easy to identify and resolve

How Sender Domains Behave in Different Scenarios

Shared Domains (Agency or Platform)

When using shared sending domains, public email addresses such as Gmail or Yahoo are supported. The CRM automatically adjusts the sender email behind the scenes to meet compliance requirements, allowing campaigns to send successfully without user intervention.

Single Dedicated Domain

If your location has one verified dedicated domain, it is automatically selected during the send or schedule step. The sender email must match this domain, and real-time validation ensures campaign compliance before sending.

Multiple Dedicated Domains

When multiple verified domains are available, you can choose a specific domain for your campaign or select All Domains. Choosing All Domains allows the platform to rotate sending across eligible domains based on internal rules to help manage deliverability at scale.

How to Set Up and Configure Sender Domains for a Campaign

Sender domain selection occurs naturally as part of sending or scheduling an email campaign. There's no separate setting to turn on or configure in advance.

Step 1: Go to Campaigns

Navigate to Marketing → Emails → Campaigns.

Step 2: Open a Campaign

Open a new campaign or an existing draft.

Step 3: Review Campaign Details

Inside the email campaign builder, click Send or Schedule to review the campaign details.

Step 4: Confirm Sender Details

In the Sender Details section, confirm the Sender Name and Sender Email.

Step 5: Choose a Sender Domain

Open the Sender Domain dropdown to see which sending options are available for your location. The options shown change based on your email domain configuration:

• If using shared domains, public email addresses are supported and automatically adjusted for compliance
• If one dedicated domain is available, it's pre-selected and must match the sender email
• If multiple dedicated domains are configured, you can choose a specific domain or select All Domains to let the platform rotate sending across eligible domains

Step 6: Resolve Warnings or Errors

If a warning or error appears, use the Review Domain Configuration hyperlink to check domain verification, warm-up status, or IP assignment.

Warnings indicate potential issues, such as a sender email and sender domain mismatch — campaigns can still be sent, but matching domains is recommended to reduce spam filtering risk.

Errors indicate blocking issues where the campaign cannot be sent until the problem is fixed.

Final Step

Once everything looks good, finish sending or scheduling your campaign. The sender domain you choose becomes locked to the campaign when it's sent or scheduled.

Frequently Asked Questions

Why am I seeing a warning even though my campaign can still be sent?

Warnings appear when there's a potential deliverability issue, such as a sender email and domain mismatch. The campaign can still be sent, but matching domains is recommended to avoid spam filtering.