yourDMARC Blog

Stay updated with the latest in email security, DMARC best practices, and protection against phishing threats.

November 10, 2026

DMARC p=reject: Get There Without Breaking Email

DMARC p=reject tells receiving servers to refuse mail that fails DMARC. Get there in stages: publish p=none with a rua address, fix each legitimate sender with aligned DKIM or SPF, then move to p=quarantine and finally p=reject.

November 8, 2026

Multiple SPF Records: Why They Break and How to Fix

Multiple SPF records on one domain cause an SPF permerror, so SPF fails for every message. A domain may publish only one v=spf1 TXT record. Fix it by merging all include and ip mechanisms into a single record.

November 7, 2026

DMARC Policy Not Enabled: What It Means and How to Fix It

DMARC policy not enabled means no valid DMARC record was found at _dmarc.yourdomain, or the policy is p=none. Publish one TXT record with v=DMARC1, a p= tag and an rua address, then move to quarantine and reject.

November 6, 2026

DMARC for Large Organizations: A Rollout Guide

DMARC for large organizations means inventorying every sender, publishing p=none with reporting, and fixing SPF and DKIM alignment. Then move to quarantine and reject in stages under central ownership.

November 5, 2026

How to Trace Email Headers Back to the Sender

To trace email headers, open the full original source and read the Received lines from bottom to top; each line is one server hop. Then check Authentication-Results for SPF, DKIM and DMARC.

November 4, 2026

DMARC Scanner: What It Checks and How to Use One

A DMARC scanner looks up a domain's DNS records and reports whether DMARC, SPF and DKIM are published and valid. It flags syntax errors, weak policies and missing tags, but it can't show who actually sends mail as your domain.