SMTP2GO DKIM Setup Instructions

SMTP2GO DKIM Requirements

To configure DKIM (and SPF) with SMTP2GO, you’ll need to verify your sender domain and publish the required DNS records. Follow the steps below.

Step 1: Access the Verified Senders Page

1. Log in to your SMTP2GO dashboard.

2. In the left-hand menu, navigate to:
   Sending > Verified Senders > Sender domains

3. Click Add sender domain, enter your domain (e.g., exampledomain.com if you’re sending from [email protected]), and click Continue with this domain.
   

Step 2: DNS Records Setup

1. After adding your sender domain, SMTP2GO will generate CNAME records for DKIM and SPF.

2. Copy these values exactly as shown in the interface. Add the generated CNAME records to your domain’s DNS provider.

   

Step 3: Add DKIM Keys to Sendmarc or DNS

If you are using Sendmarc for DNS record management, make sure to input the generated DKIM CNAME entries into your Sendmarc Portal. 

If you’re not using Sendmarc for DKIM management, add all entries (including your DKIM keys) to your DNS.

Step 4: Add Additional CNAME Records for Alignment & Tracking

Important: These CNAME records must go directly into your DNS — not into Sendmarc.

• EM Subdomain (Return Path Alignment)
  This top CNAME record represents a subdomain that allows your return path domain to align with your sending domain.

• Tracking Domain
  This bottom CNAME record ensures all email links use secure https rather than http.

Step 5: Record Validation

1. Return to the SMTP2GO dashboard.

2. Click the Validate button next to your domain.

3. Once validated successfully, your domain will begin authenticating with DKIM and SPF.