Email Authentication
19 articles
Email Subdomain vs Root Domain: What to Send From Should you send marketing email from a subdomain or your root domain? What a sending subdomain really isolates, what crosses anyway, and when not to migrate. DKIM2 and DMARCbis: What Changes Next in Email Authentication DKIM2 signs a message at every hop so forwarding no longer breaks authentication. Where the IETF draft stands, what DMARCbis changes, and what to do now. Email Authentication Checklist: SPF, DKIM, DMARC, ARC, BIMI A per-protocol checklist for SPF, DKIM, DMARC, ARC and BIMI: what each standard does and the settings to get right for each one before you send. Reverse DNS Lookup: What it is and How to Set it Up Reverse DNS maps an IP address back to a hostname. What rDNS is, how to run a lookup on Windows, macOS and Linux, and how to add the PTR record senders need. A 5-Minute Email Deliverability Check Before Hitting Send A 5-minute email deliverability check that catches spam triggers, auth failures, and provider-specific filtering. Full walkthrough with video and triage table. How to Fix Email Delivery Problems at Outlook Fix Outlook email delivery problems: diagnose authentication, reputation, technical, and compliance issues to land in the inbox instead of spam. Inbox for the Holidays: Proven Email Deliverability Tips Get your emails into the inbox this holiday season. Learn deliverability strategies from the “Inbox for the Holidays” webinar. How to Warm-Up Your Email and Domain for Trust Building Learn how to warm up your email and domain step by step to build sender trust, avoid spam folders, and improve deliverability. Top Reasons Why Your Emails Aren’t Being Delivered & Solutions Do you keep asking "why is my email not being delivered?" This guide inspects the most common email delivery issues and shows how to fix them What is a BIMI Record, and How do You Create One Learn what a BIMI record is, why it matters for email security, and how to create one step by step to display your brand logo in the inbox. SPF vs. DKIM: Key Differences Between The Two Explore SPF vs. DKIM: Key differences outlined to enhance your email security. Understand how these protocols work to protect your email from threats. DMARC vs. DKIM: Definition and Key Differences DMARC vs DKIM: what each record does, how they differ, and how they work together to authenticate your email and stop domain spoofing. Email Authentication 101: DKIM, SPF, DMARC Explained Email Authentication 101 covers DKIM, SPF, DMARC, ensuring secure and verified email communication. Learn how these protocols protect your inbox. How to Remove Your Email from Blacklists: A Step-by-Step Guide Learn the steps for email blacklist removal to restore your email deliverability, improve communication, and maintain a clean sender reputation. Adapting to Gmail and Yahoo’s Spam Protection Requirements Gmail and Yahoo's new sender requirements, effective February 2024, mark a major shift in email standards to combat spam and improve security. What Is a DMARC Record? Setup, Examples, and Why It Matters Secure your email domain with a DMARC record in 2024: Understand its importance in preventing spoofing and phishing for robust email security and trust. What Is a DKIM Record? How to Set It Up and Check It [2026] Enhance email security with a DKIM record: Learn what it is and how to set it up correctly to improve your email deliverability and protect against fraud. What Is an SPF Record? How to Create and Check One [2026] Unspam your emails with a correct SPF record. Learn the essentials of SPF records and get step-by-step guidance on creating one effectively. Why Domains Get Blacklisted: Causes, Signs and URI Blacklists Why a sending domain lands on a URI blacklist such as SURBL or URIBL, how domain listings differ from IP listings, and the signs that you have been listed.
![What Is a DKIM Record? How to Set It Up and Check It [2026]](/images/articles/dkim/dkim-cover.webp)
![What Is an SPF Record? How to Create and Check One [2026]](/images/articles/spf/spf-cover.webp)
