Stop Hackers From Using Your Email: The Beginner's Guide to DMARC

Imagine a scammer sends an email to your client that looks like it came exactly from you. It has your name, your domain, and your logo. The client clicks a bad link, loses money, and blames you.

This is called "Email Spoofing," and it happens to businesses every day.

You might think, "But I already added SPF and DKIM records!" That is a great start, but those are just "ID Cards." They verify who you are, but they don't tell the receiver what to do if an impostor shows up.

That is why you need DMARC.

What is DMARC? (The "Security Guard")

DMARC (Domain-based Message Authentication, Reporting, and Conformance) is a policy you set in your DNS.

Think of it as the instruction manual you give to Gmail, Outlook, and Yahoo. It tells them:

"If an email claims to be from me, but fails the SPF or DKIM check, here is what I want you to do with it."

The 3 DMARC Policies

When you create a DMARC record, you must choose one of three strictness levels (called p= policies):

1. p=none (The "Observer"):
   • "Just tell me about it."
   • Use this when you are first setting things up. Gmail will deliver the fake emails but send you a daily report so you can see who is trying to hack you.
2. p=quarantine (The "Suspicious"):
   • "Put it in the Spam folder."
   • If an email fails the check, it goes straight to Junk. This protects the Inbox but keeps the email accessible just in case.
3. p=reject (The "Terminator"):
   • "Destroy it immediately."
   • The fake email is blocked completely. The receiver never even sees it. This is the ultimate goal for brand protection.

How to Add DMARC in 2 Minutes

Just like SPF, DMARC is simply a TXT Record in your DNS settings.

The Basic Record:

v=DMARC1; p=none; rua=mailto:yourname@yourdomain.com

• v=DMARC1: Version tag.
• p=none: The policy level (start with 'none').
• rua: The email address where you want to receive daily security reports.

How to Check If You Are Protected

Setting up DMARC is useless if you make a typo. A broken record is the same as no record.

1. Go to the https://findinfo.io/tool/dns-lookup FindInfo DNS Lookup.
2. Enter your domain.
3. Look for the TXT Record starting with _dmarc.

Conclusion

Email security is a journey. SPF is your passport, DKIM is your signature, and DMARC is your bodyguard. If you are running a serious business, you cannot afford to leave your domain unprotected.

Is your domain safe from spoofing? https://findinfo.io/tool/dns-lookup Run a DMARC check now.