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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...
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 ...
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...
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...
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...
Last updated: May 22, 2026 — by the Mailpro Deliverability Team
Quick answer: To keep your spam complaint...
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...
“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...
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...
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...
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...
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 &l...
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...
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 ...
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?
...
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 (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...
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...
Email deliverability issues can be incredibly frustrating and can significantly impact the effectiveness of your marketing efforts. When your messages fail to reach the inbox, not only do you lose the opportunity to connect with ...
In the world of email marketing, reaching your subscribers’ inboxes is akin to securing a golden ticket—it’s essential for ensuring your messages are seen and engaged with. One vital tactic to enhance this reach is encourag...
