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Introduction

A CNAME (Canonical Name) record is a type of DNS record that maps one domain name to another. In simpler terms, it tells email servers and other services that a subdomain of your domain is an alias for another domain.

For Vtiger email campaigns, CNAME records are used to:

• Track bounce messages
• Ensure accurate reporting of campaign performance
• Improve email deliverability

Benefits of Adding a CNAME Record

The benefits of adding a CNAME record are:

• Improves Email Deliverability: Emails sent from Vtiger are more likely to reach recipients’ inboxes instead of being marked as spam.
• Tracks Bounces Accurately: Vtiger uses the CNAME record to collect and parse bounce messages for email campaigns, helping you calculate bounce rates correctly.
• Avoids SPF Lookup Limits: SPF records have a maximum of 10 DNS lookups. Domains using multiple email services often exceed this limit, causing errors and failed email delivery. Adding a CNAME record avoids this issue.
• Ensures DMARC Compliance: Vtiger uses ca.vtiger.email as the Return-Path domain. Without a CNAME record, SPF alignment may fail during DMARC checks, reducing email deliverability.

Why Use CNAME Instead of only SPF or DKIM?

• SPF Limitation: SPF can include a maximum of 10 DNS lookups. Using multiple services (e.g., Google, Outlook, and Vtiger) can easily exceed this.
• DMARC Identifier Alignment: Vtiger campaigns use ca.vtiger.email as the Return-Path domain. Adding a CNAME record ensures SPF alignment passes DMARC checks.

 

Adding a CNAME Record for Email Campaigns

Here are the CNAME record details you will need to configure on your domain:

• Host: ecm-bounces
• Type: CNAME
• Points to: ca.vtiger.email

Follow these steps to add a CNAME record:

1. Log in to your domain registrar or DNS hosting provider.
2. Navigate to the DNS management section.
3. Click Add Record > CNAME Record.
4. Enter or select the following information:
   1. Host/Name: ecm-bounces
   2. Type: CNAME
   3. Points to / Value: ca.vtiger.email
5. Save the record and allow DNS propagation.
6. Verify the record using tools like MXToolbox.

To learn more about adding a CNAME record for Vtiger email campaigns, click here. 

 

Reference

• DMARC Records in Vtiger CRM
• Authenticate Emails with SPF, DKIM, and SenderID
• Improving Email Deliverability
• Understanding Email Bounces and Error Codes
• Email Campaigns for Marketing