The mySMTP DKIM Checker — Explained
A plain-language guide to what happens behind the scenes every time you look up a DKIM record.
What is the Best SMTP Port to Use for Sending Emails? Ports 25, 465, 587 and 2525 Explained
Most senders pick a port without understanding why it matters. The wrong choice can get your messages silently dropped, rejected by ISPs, or sent without encryption.
Why Self-Hosting SMTP Is No Longer Worth It
Why Self-Hosting SMTP Is No Longer Worth It There was a time when running your own SMTP server made sense. It gave you control. It felt reliable. But today? It’s mostly extra work. It’s Not About Sending – It’s About Deliverability Setting up an SMTP server is easy. Getting emails into the inbox is not. You are dealing with: SPF, DKIM, DMARC IP […]
How AI Is Rapidly Changing the Spam Filtering Landscape
How AI Is Rapidly Changing the Spam Filtering Landscape For years, email spam filters worked like strict security guards with a checklist. They looked for suspicious keywords, strange formatting, blacklisted IP addresses, or domains that had a bad reputation. If your message triggered too many rules, it landed in the spam folder. But that world […]
AI and email today: What’s already changed — and what comes next
AI and email today: What’s already changed — and what comes next AI is moving fast. In some areas, extremely fast. In a short time, we have gone from experimental AI-created visuals to visuals that are good enough for real marketing, real products, and real brands. Text, translation, data analysis, and automation have all improved at a remarkable pace. But email is different. […]
Test your email for compliance – FREE
Once, a Stamp on the Envelope Was Enough In the old analog world, we sent physical letters for more than 100 years based on a stamp with a value indicating the letter’s weight, size, and the physical distance the letter had to travel to reach the recipient.At the post office, the stamp was marked with […]
Part 3 – Sending Emails Too Fast Is the New Deliverability Problem
Sending Too Fast – The New Deliverability Problem Sending Too Fast The New Deliverability Problem of 2026 What Inbox Providers Are Watching ⚡ Emails per minute velocity 📈 Gradual ramp vs sudden burst 📊 Dormant to high volume shifts 🎯 Smooth vs spiky patterns Old vs New Warm-Up Strategy ❌ Old Approach (Outdated) Focus on […]
Gmail Tightens Enforcement:What Senders Must Know by November 2025
Gmail Tightens email compliance Enforcement: What Senders Must Know by November 2025 Starting November 2025, Gmail will ramp up enforcement on non-compliant email traffic. Messages that don’t fully meet Gmail’s sender requirements risk temporary or permanent rejections — effectively blocking your emails from reaching inboxes. This move follows Gmail’s earlier authentication mandates (SPF, DKIM, DMARC) and aims to further reduce spam and abuse. Google’s focus is now […]
Part 2: Complying with the 75% of global email traffic controlled by MAGY
Part 2: Complying with the 75% of global email traffic controlled by MAGY In Part I, we explored how the MAGY providers (Microsoft, Apple, Gmail, and Yahoo) have reshaped the email marketing landscape with stricter rules around authentication, reputation, engagement, and list quality. These changes may feel overwhelming, but they also create opportunities for senders who adapt quickly. […]
Check if your SPF record is ready to send with mySMTP & SMTP.DK
Check if your SPF record is ready to send with mySMTP & SMTP.dk Introducing the mySMTP SPF Validator: We know how important it is to keep your emails landing safely in your recipients inboxes. That’s why we’ve created the mySMTP SPF Internal Validator – a simple, powerful tool to be used with mySMTP & SMTP.dk outgoing SMTP. With the […]