DNS Authentication combines three industry-standard email authentication technologies that allow domain owners to control who sends on behalf of their domains. It also validates the authenticity of inbound messages.
What is Mimecast?
Mimecast is an email security and management platform that helps organizations protect their email systems from threats such as spam, phishing, malware, and unauthorized emails. It provides services like email filtering, threat protection, archiving, and email continuity.
Common Reasons to Use DNS Authentication Bypass:
- Allow emails from trusted vendors or partners.
- Prevent false positives caused by authentication failures.
- Ensure business-critical emails are delivered.
- Support third-party applications that send emails on behalf of your organization.
How to Configure DNS Authentication Bypass in Mimecast:Walkthrough Guide
I’ll guide you step by step. Please follow the steps provided below.
1: Login on Mimecast portal and go to Administration –> Gateway –> Policies
Step 2: Under Policies, go to Definitions –> DNS Authentication – Inbound –> New DNS Authentication -Inbound Checks
Step 3: exit from Definitions menu. Now click on Go Back option.
Step 4: Under Policies again, go to DNS Authentication – Inbound –> New Policy –> Provide a policy name and under Select Option, chose a definition that was recently created.
Step 5: Click on Save and Exit
Why Configure DNS Authentication Bypass in Mimecast?
DNS authentication checks such as SPF, DKIM, and DMARC help verify whether an email sender is legitimate. However, sometimes trusted senders or business applications may fail these checks due to incorrect DNS configuration or third-party email services.
Configuring a DNS Authentication Bypass allows specific trusted senders or domains to bypass these checks so legitimate emails are delivered successfully instead of being blocked or quarantined.
Benefits
- Improves email delivery by allowing trusted senders to bypass unnecessary authentication failures.
- Reduces false positives by preventing legitimate emails from being blocked or quarantined.
- Maintains business communication with trusted vendors, applications, and partners.
- Simplifies email management by creating controlled exceptions for specific senders.
- Provides flexibility while keeping overall email security policies in place.