Dominio de correo electrónico: qué es y cómo protegerlo
Dominio de correo electrónico: descubre cómo autenticarlo, alinear SPF, DKIM y DMARC, y proteger la entrega de mensajes legítimos y esperados.
Sep 8, 202622 min read
Dmarc
103 articles on dmarc.
DNS TXT Record: The Email Authentication Record Explained
Learn what a DNS TXT record is, how SPF, DKIM, and DMARC use it, and how correct DNS publishing protects email deliverability and trust.
Sep 8, 202621 min read
DMARC Reporting: What It Is, How to Read Reports, and How to Fix Failures
Learn how DMARC reporting works, what aggregate and failure reports reveal, how to calculate pass rates, and how to fix DMARC alignment issues.
Sep 8, 202621 min read
DKIM (DomainKeys Identified Mail): What It Is and How It Works
Learn what DKIM (DomainKeys Identified Mail) is, how email signatures work, why alignment affects delivery, and how to set up and troubleshoot DKIM.
Sep 8, 202623 min read
DMARC Record Validator: Check, Fix, and Test Your DNS Policy
Use a DMARC record validator to find DNS syntax, duplicate-record, alignment, and reporting errors—then test the policy with a practical example.
Sep 4, 202617 min read
Bulk Mail Anbieter: Definition, Auswahl und Zustellbarkeit
Bulk Mail Anbieter versenden Kampagnen im großen Umfang. Erfahren Sie, welche Infrastruktur, Funktionen und Regeln die Zustellbarkeit sichern.
Sep 3, 202621 min read
Branded Email: What It Means for Trust, Deliverability, and Campaigns
Branded email combines a recognizable sender, consistent design, and verified domain identity. Learn how it supports trust, engagement, and deliverability.
Sep 2, 202621 min read
Brand Identity in Email: Definition, Deliverability, and Trust
Learn how brand identity in email combines visible design, sender domains, authentication, and message consistency to support trust and deliverability.
Sep 2, 202624 min read
BIMI Email: What It Is, How It Works, and How to Set It Up
Learn what BIMI email is, how DMARC, SVG logos, and VMC or CMC certificates work, and how to troubleshoot inbox logo display for senders.
Sep 1, 202622 min read
Email Authentication Protocols: SPF, DKIM, and DMARC
Email authentication protocols—SPF, DKIM, and DMARC—prove who can send for your domain, protect against spoofing, and support reliable inbox delivery.
Aug 31, 202623 min read
SPF Email Authentication: What It Is, How It Works, and How to Fix It
Learn how SPF email authentication works, how SPF records are evaluated, common DNS errors, and practical steps to fix authorization failures fast.
Aug 29, 202623 min read
DMARC Record Type: TXT Syntax, Setup, Tags, and Examples
Learn the DMARC record type, exact TXT record syntax, required tags, reporting setup, validation steps, and mistakes that can break email authentication.
Aug 27, 202618 min read
Email Authentication: SPF, DKIM, and DMARC Explained
Learn how email authentication uses SPF, DKIM, and DMARC to prevent spoofing, protect domains, and improve email deliverability.
Aug 26, 202624 min read
Email Sending Domain: Definition, DNS Records, and Deliverability
Learn what an email sending domain is, how DNS authentication works, and how to protect deliverability, brand trust, and campaign performance.
Aug 26, 202626 min read
How to Add SPF, DKIM, and DMARC Records in DigitalOcean DNS
Learn how to add SPF, DKIM, DMARC, and return-path records in DigitalOcean DNS, avoid hostname errors, and verify email authentication.
Aug 18, 202619 min read
How to Add SPF, DKIM, and DMARC Records in Squarespace
Learn how to add SPF, DKIM, DMARC, and return-path DNS records in Squarespace without broken hosts, duplicate SPF, or alignment issues.
Aug 18, 202621 min read
Hetzner SPF DKIM DMARC Setup: Add Email DNS Records Correctly
Set up SPF, DKIM, DMARC, and return-path DNS records for a Hetzner domain. Avoid host-name errors, verify alignment, and protect delivery.
Aug 18, 202621 min read
DreamHost SPF, DKIM, and DMARC Setup for Email Domains
Set up DreamHost SPF, DKIM, DMARC, and return-path DNS records correctly to authenticate email, pass alignment, and avoid common DNS mistakes.
Aug 18, 202620 min read
IONOS SPF, DKIM, and DMARC Setup for Sending Domains
Set up IONOS SPF, DKIM, DMARC, and return-path DNS records correctly, avoid hostname mistakes, and verify your sending domain for email.
Aug 18, 202618 min read
Gandi SPF, DKIM, and DMARC Setup for Sending Email
Set up SPF, DKIM, DMARC, and a custom return-path for a Gandi domain with exact DNS record shapes, dashboard steps, and fixes for common errors.
Aug 18, 202621 min read
How to Add SPF, DKIM, DMARC, and Return-Path Records in Porkbun
Learn how to add SPF, DKIM, DMARC, and return-path DNS records in Porkbun, avoid host-field mistakes, and verify email authentication.
Aug 18, 202623 min read
Gmail Blue Checkmark Expirations: Why BIMI Needs an Operations Plan
Gmail blue checkmark certificates are expiring at notable rates. Learn what lapsed BIMI means, how to measure ROI, and build a renewal plan.
Aug 18, 202619 min read
How to Add SPF, DKIM, DMARC, and Return-Path Records in Hostinger
Add SPF, DKIM, DMARC, and return-path DNS records in Hostinger hPanel. Avoid hostname mistakes, verify each record, and improve email delivery.
Aug 18, 202618 min read
Namecheap SPF, DKIM, and DMARC Setup for Sending Domains
Set up Namecheap SPF, DKIM, DMARC, and return-path DNS records correctly, avoid host-field mistakes, and verify your email domain.
Aug 17, 202621 min read
How to Add SPF, DKIM, DMARC, and Return-Path Records in GoDaddy
Add SPF DKIM DMARC records in GoDaddy with the right TXT and CNAME values, avoid hostname mistakes, and verify your email domain step by step.
Aug 17, 202621 min read
How to Add Route 53 Email Authentication Records for SPF, DKIM, and DMARC
Add Route 53 email authentication records correctly with this practical guide to SPF, DKIM, DMARC, return-path DNS, testing, and fixes.
Aug 17, 202619 min read
How to Add SPF, DKIM, and DMARC Records in Cloudflare
Learn how to add SPF, DKIM, DMARC, and return-path DNS records in Cloudflare, avoid host-name errors, and verify your sending domain.
Aug 17, 202620 min read
Troubleshooting Email Delivery Issues: A Developer’s Guide
Troubleshooting email delivery issues? Diagnose API, SMTP, DNS, authentication, bounces, spam placement, and recipient-side failures systematically.
Aug 17, 202623 min read
Are Your Outlook Emails Going to Spam Because of DMARC?
Outlook emails going to spam can be a DMARC alignment problem. Learn how to inspect headers, fix SPF/DKIM, and publish a safe policy.
Aug 16, 202620 min read
Raw DMARC Reports API: How to Retrieve, Export, and Parse Them
Learn how to retrieve raw DMARC reports from an API, request XML when supported, preserve originals, parse RUA data, and troubleshoot access.
Aug 16, 202622 min read
Getting Started With DMARC Digests: Configure, Read, and Use RUA Reports
Learn how to configure DMARC digests, receive RUA aggregate reports, interpret SPF/DKIM alignment, and move safely toward enforcement.
Aug 16, 202624 min read
DMARC Untrusted Sources: How to Investigate and Fix Them
Learn what DMARC untrusted sources mean, how to separate spoofing from valid senders, and how to fix SPF, DKIM, and alignment issues.
Aug 16, 202622 min read
DMARC Trusted Sources: How to Identify Legitimate Email Senders
Learn how to interpret DMARC trusted sources, verify legitimate senders, fix SPF/DKIM alignment, and safely enforce DMARC policies.
Aug 16, 202621 min read
DMARC Troubleshooting Tips and Tricks for Reliable Email Delivery
Use these DMARC troubleshooting tips to fix alignment, SPF, DKIM, DNS, reporting, and delivery failures before they affect legitimate email.
Aug 16, 202620 min read
DMARC FAQ: Setup, Alignment, Policies, and Reports
DMARC FAQ for developers: learn record syntax, SPF and DKIM alignment, p=none to reject policies, aggregate reports, and debugging steps.
Aug 16, 202619 min read
How to Update an SPF Record When One Already Exists
Learn how to update an SPF record when one already exists, merge authorized senders, avoid PermError, and validate DNS safely.
Aug 15, 202621 min read
How to Verify a Domain for Transactional Email Sending
Learn how to verify a domain for email sending with DNS, SPF, DKIM, DMARC, validation commands, troubleshooting, and deliverability checks.
Aug 15, 202621 min read
What Is DMARC? How Email Authentication, Alignment, and Policies Work
What is DMARC? Learn how SPF, DKIM, alignment, DNS policies, reports, and enforcement protect your domain from email spoofing.
Aug 15, 202623 min read
What Is DKIM? A Developer’s Guide to Email Authentication
What is DKIM? Learn how DKIM email signatures, DNS selectors, key rotation, and DMARC alignment protect messages and support deliverability.
Aug 15, 202623 min read
How to Fix DMARC Policy Bounces: A Technical Guide
Fix DMARC policy bounces by diagnosing SPF, DKIM, and domain alignment failures, validating DNS records, and safely restoring delivery.
Aug 14, 202620 min read
Google Sender Reputation: How to Improve Gmail Deliverability
Improve Google sender reputation with authentication, list hygiene, compliant unsubscribe flows, and Postmaster Tools monitoring for Gmail delivery.
Aug 13, 202620 min read
Sender Reputation Lookup: Check Your Email Domain and IP Health
Use a sender reputation lookup to check domain, IP, blocklist, and mailbox-provider signals, then fix the issues hurting email delivery.
Aug 13, 202620 min read
Is It Better to Send Emails From a Subdomain or Root Domain?
Should you send emails from a subdomain or root domain? Learn the deliverability, DNS, DMARC, reputation, and operational trade-offs.
Aug 12, 202622 min read
Apple Branded Mail Setup: DNS, DMARC, and Verification Guide
Set up Apple Branded Mail with the right DMARC policy, DNS verification, brand assets, testing workflow, and troubleshooting steps.
Aug 12, 202622 min read
How to Avoid Outlook’s Spam Folder: A Developer’s Deliverability Guide
Avoid Outlook’s spam folder with aligned SPF, DKIM, and DMARC, clean sending practices, useful headers, and practical diagnostics for developers.
Aug 11, 202620 min read
2048-bit DKIM: Do You Need It for Email Delivery?
Do you need 2048-bit DKIM? Learn when 1024-bit is acceptable, how DNS limits affect setup, and how to verify DKIM for reliable delivery.
Aug 11, 202619 min read
Email Domain Audit: The SPF, DKIM and DMARC Checklist That Actually Protects Deliverability
Run an email domain audit that goes beyond DNS records. Fix SPF, DKIM, DMARC alignment, list hygiene, and bulk-sender compliance.
Aug 9, 202619 min read
Email Deliverability Expert: How to Hire, Vet, and Work With One
Learn what an email deliverability expert does, when to hire one, how to vet their skills, and how to fix authentication, reputation, and inboxing.
Aug 8, 202623 min read