Deliverability and anti-spam

DMARC record example and tags explained: how to go from p=none to p=reject

DMARC record example: the short answer A DMARC record example that works for almost any domain on day one is v=DMARC1; p=none; rua=mailto:[email protected], published as a TXT record on the host _dmarc.example.com. That r...

Holiday email deliverability: how to stay out of spam during peak season

Holiday email deliverability: what changes between November and December? Holiday email deliverability is harder than the rest of the year for one reason: everyone sends more at the same time, and Gmail, Yahoo and Microsoft respo...

Can You Spot the Spam?

Can you spot the spam? Take the 60-second quiz You've deleted thousands of spam emails on pure instinct. But could you explain why your brain flagged them? More importantly, could a spam filter? Below are seven emails. F...

Sending subdomains: split marketing from transactional

What is a sending subdomain? A sending subdomain is a subdomain of your main domain — for example news.yourbrand.com or mailer.yourbrand.com — that you use as the "From" domain for a specific stream of ...

Why two-factor authentication is the best two minutes you'll spend on accoun...

Two-factor authentication: the two-minute upgrade that protects your entire Mailpro account Two-factor authentication (2FA) is the single most effective step you can take to protect your Mailpro account, and it takes less th...

The 3-Second Journey of Your Email After You Hit "Send"

You write the email. You check the subject line one last time. You hit Send. And then… nothing. A little "sent" confirmation, and you move on with your day. But in those three quiet seconds, your humble email j...

Why Is It Actually Called "Spam"? The Weird, True Story Behind the Word

You delete it every day. You've trained your thumb to swipe it away without even reading the sender. But have you ever stopped to wonder why we call unwanted email "spam" in the first place — and not, say, &qu...

How to Reduce Spam Complaint Rate Below 0.1%

Last updated: May 22, 2026 — by the Mailpro Deliverability Team Quick answer: To keep your spam complaint rate belo...

Bounce Types That Actually Matter in 2026 + What to Fix First

In the digital landscape of 2026, the concept of a "bounce" has undergone a radical transformation. For businesses leveraging email marketing software, the bounce report is no longer a simple list of "dead" addresses; it is a s...

How to Evaluate Your Email Sending Health

“Email sending health” is your ability to consistently reach the inbox and get engagement—without rising bounces, spam complaints, or sudden performance drops. The tricky part is that deliverability problems oft...

Why Am I Getting Blocked by Microsoft/Outlook? Causes + Fixes

If Microsoft/Outlook is blocking your emails, it usually isn't random. It's almost always one of these: authentication issues (SPF/DKIM/DMARC), sender reputation (IP or domain), complaints, list quality, or sudden sending...

SPF and IPv6: Why SPF Can Fail Even When It Looks Correct

Many senders believe SPF is a simple checkbox: add one record, confirm it exists, and move on. Unfortunately, email authentication is no longer that simple. Today, it is very common for SPF to exist, look correct, and still ...

Email Deliverability: What It Is, Why It Matters & How to Improve Inbox Plac...

Diagnosing a specific problem? See our guides on troubleshooting email deliverability, what SPF is and how to set it up, and how to stop WordPress emails going to spam. What Is Email Deliverability? Email deliverability r...

One-Click Unsubscribe (RFC 8058): List-Unsubscribe Headers, Copy/Paste Examp...

If you send marketing emails at any real scale, “unsubscribing” isn’t just a footer link anymore. Gmail and Yahoo want bulk senders to support one-click unsubscribe so people can leave easily (and so they don’t hit “Mark as spam”...

Spam Complaint Rate Explained (0.3% Threshold) + Practical Ways to Lower It

Your spam complaint rate is one of the fastest ways to lose inbox placement—because it reflects what real people do with your emails. And now, major mailbox providers have made the expectations crystal clear: if you’re a bu...

7 Email Marketing Mistakes We Saw in 2026

Which email marketing mistakes hurt senders most in 2026? In 2026, the email marketing mistakes that cost the most are the ones you cannot see in your newsletter editor: missing authentication, unsubscribe links that take more...

How to Fix a Sudden Drop in Email Deliverability: A Simple Troubleshooting G...

Imagine this: you launch your newsletter, hit “send,” and instead of seeing your usual open rates, you notice a dramatic drop. Your heart sinks. Did all your emails go to spam? Did Gmail suddenly decide to block you? ...

Inbox Placement That Sticks: Improve Email Deliverability in 2026

Great deliverability isn’t luck. It’s the result of clear consent, smart sending habits, solid authentication, and messages people actually want. In 2026, Gmail and Yahoo formalized strict (but fair) rules for bulk senders; doing...

BIMI in 2026: Show Your Verified Logo in the Inbox (Simple Guide + VMC/CMC C...

BIMI (Brand Indicators for Message Identification) lets mailbox providers display your brand logo next to your emails—once your domain is properly authenticated and you publish a small TXT record in DNS. In practice, this m...

How to Prevent Email Spoofing: The Complete Guide

Getting your email authentication right? See what SPF is and why SPF fails with IPv6. Email authentication relies on three DNS records working together: SPF, DKIM and DMARC. Introduction Email spoofing might sound like a co...