What is a DMARC records and how to create it?

What is a DMARC records and how to create it?

  1. Bhawani Singh
    DMARC is an abbreviated form of Domain-based Message Authentication, Reporting and Conformance. It plays a great role in controlling and blocking the spoof or spam mails. So by using this you will be able to keep and maintain you email inbox clean without any spasm and you will be capable of blocking the spoof mails. A spam or spoof mails are mails that are 100% fraud and are sent to hack your system or cheat on cash. By spoofing anyone or a stranger can send mails to the customers, suppliers, employees, etc pretending to be you. Some examples of spam or spoof mails are your payment details have expired, please pay the invoice, I need to confirm your personal details, Follow this link to reset, etc. Terms such as credit card, debit card, offers, coupons, free sale, flat 50% or 100%, etc are often found and are common in spoof or spam emails.

    DMARC plays important role in spamming?

    They are usually sent with a form asking for your bio data and personal information. So please be aware of these spoof mails and don’t give any kind of personal information unless you are sure that it is a genuine mail. These spam mails are sent in large numbers and regularly. They often tend to fill up the storage of your email inbox. However some of the spam mails are automatically stored in the spam folder of your email inbox. This is because they are marked and reported as spam by many users. But not all spam mails get stored in spam folder, they tend to fill up the email inbox often and it is a really tired work to clear out those mails. Here is a great and effective solution for blocking and preventing your email inbox from getting filled up with spam or spoof mails.

    How to DMARC records?

    Here is a step by step guide to set up DMARC on DNS server.
    • Here, the sender has the policy and the receiver tries to reject the messages which are not aligned. The receiver has to send the report regarding the rejection process to another mail.
    Code:
    v=DMARC1;p=reject;pct=100;rua=mailto:postmaster@dmarcdomain.com
    • Then make sure that they quarantine the messages which are received under the action of request. The action will not be taken, if the message has received from domain.com and DMARC would not configure.
    Code:
    v=DMARC1;p=quarantine;pct=100;rua=mailto:postmaster@dmarcdomain.com
    • The message from DMARC gets failed and the quarantine has only 5% remaining time.
    Code:
    "v=DMARC1; p=quarantine; pct=5; rua=mailto:postmaster@your_domain.com" 
    • In this step, the sender have set the policy to meet 100% rejection time and so the report has to send on daily basis to dmarc@yahoo_domain.com
    Code:
    "v=DMARC1; p=reject; rua=mailto:postmaster@your_domain.com, mailto:dmarc@your_domain.com"
    This will allow you to control and set the reports on your comfort. It will allow you to assess vulnerabilities regarding the day-to-day reports and in adjusting SPF and DKJM based on your well and wish. You will be able to make changes and modify settings on your own wish.