How to master email security with DMARC

How to master email security with DMARC

If you are a business sending transactional emails, you need to ensure that the recipient is receiving a verified email from you or your business and is not malicious. These are just some of the reasons why you need to protect your domain with SPF, DKIM, and DMARC records. Mastering email security with DMARC will ensure that you are sending verified email identities to the recipients of your emails. This will not only meet your brand's objectives, but also assist with mitigating spam complaints originating from ISPs or even malicious users. DMARC, or Domain-based Message Authentication, Reporting & Conformance is an email authentication method that allows users to authenticate whether domains are authorized to send emails with their domain. When one domain supports DMARC, it will reject emails from unauthenticated domains and provide immediate insight into their email threat landscape.

As email usage grows, so does the amount of spam. Now more than ever businesses need to make sure their users are protected from fraudulent emails. When implemented correctly, DMARC can prevent the spread of malicious emails. The email authentication standard can strengthen your ability to spot fake emails, reduce phishing risks and identify the source of unwanted messages sooner. Implementing DMARC is relatively easy; however, it is important to maintain its core function before implementing. Implementing DMARC can cause a drop in email deliverability rates at first since the email ecosystem learns and adapts to the changes. As with any technology or process, constant monitoring and research is necessary to ensure success.

After two unsuccessful attempts by the industry to address the challenges with email security, DKIM alone was not enough. The new standard, DMARC is now adopted by hundreds of organizations worldwide. Unfortunately, the tedious setup can be subject to errors and can take up to three to six months before businesses can effectively see results. DMARC adoption requires careful planning, implementation, and assessment. This guide will demystify DMARC configuration best practices so you can get the most out of this powerful tool for improving email security.

Domain-based Message Authentication, Reporting & Conformance (DMARC) protects email transmissions by helping to detect and prevent email spoofing. With this technology in place, your company's domain can provide evidence in case of any legal matters raised against it. DMARC is an email validation protocol that helps identify phishing scams , data breaches, and other malicious or unauthorized usage of your domain. DMARC is a process that protects your domain's subscribers from phishing and spoofing, maintaining the correct handling of inbound email messages. It helps businesses keep their names out of the hands of spammers, phishers, and other spoofers. DMARC, also known as Domain-based Message Authentication, Reporting & Conformance, is a technology that helps companies defend their brands from phishing and email spoofing. DMARC is a new standard that you can use to set policies for your domain's emails.

The DMARC lifecycle is mostly around defining the policy, testing it in discovery mode to assess impact, establishing an enforcement plan, deploying the policy globally across entire organization/domains, and finally monitoring its effectiveness by reviewing daily logs, alerts and reports. The custom policy needs to be defined for each domain quickly, but it depends on how many e-mails are sent by that domain. It's possible to go through the process in 6 months or less. General practices of DMARC is to setup at the email gateway level, with DMARC Forensic Reports and DMARC Aggregate Reports statements published. The most simplistic common deployment use case would be to publish only the Return-Path domain, and setting DMARC policy to "none".

DMARC is a DNS published record that should be created as a text record. This record should be published in the external DNS so that all the receiving email gateways and email service provider take appropriate action on the email if they look at those records and see a valid configuration. DMARC stands for Domain-based Message Authentication, Reporting and Conformance. This is a new standard published by Easy Solutions and RFC 7489 that the entire industry is moving toward. DMARC encourages timely and accurate delivery of email across the Internet. creating a text DNS record for sending email, and publishing it in your external DNS, will send a signal to all email gateways and ESPs pointed to this message that you want them to look at your SPF and Domainkeys records, along with the DMARC Setup Guides Policy.

DMARC Policies

·      Monitor policy: p=none

·      Quarantine policy: p=quarantine

·      Reject policy: p=reject


Note: Once you have implemented DMARC policy, the receiving party needs to check if the SPF and DKIM records are published in the DNS. If not, they would reject the email by considering it as spam. DMARC (Domain-based Message Authentication, Reporting & Conformance) is an email authentication system that works alongside your existing email infrastructure. By interpreting the policies set by the domain owner, DMARC provides reporting metrics and helps to reduce spam originating from your domain.

Published by Ariya Rathi


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