Blog
Insights, guides, and best practices for email verification and deliverability.
Dark Mode Email Rendering: What Breaks and How to Fix It
Ever opened your own newsletter at night and found the logo missing? Dark mode can change your email's colours without asking you. This guide explains what breaks, why it happens and how to fix it, from easy design changes to a little CSS.
How Many Cold Emails Can You Send Per Day Without Getting Flagged?
New to cold emailing? Learn how many cold emails you can send per day from Gmail, Outlook or your own domain without landing in spam, plus a simple ramp-up plan.
Post-Holiday List Cleanup: Removing Dead Weight From Your Q1 List
Holiday sign-ups can quietly fill your list with fake and inactive addresses. Here's how to spot the dead weight, clean it out, and warm your account back up before your first Q1 campaign.
Conference and Webinar Follow-Ups: Verifying Leads Before You Nurture Them
Leads collected at conferences and webinars are rarely as clean as they look. Here's why verifying each address before you nurture it protects your sender reputation and saves the campaign.
Multi-Inbox Cold Email Infrastructure: When One Domain Isn't Enough
One inbox can only carry so much cold outreach before spam filters start noticing. This post breaks down why scaling outreach means spreading across multiple domains and inboxes, how warmup and verification protect each one, and how many you actually need for your sending volume.
Email Verification for Marketing Agencies Managing Multiple Client Lists
Marketing agencies juggle multiple client lists, and one uncleaned list can quietly damage sender reputation for every other client. Here's what email verification actually checks, the risky address types hiding in most lists, and a practical workflow agencies can use to keep deliverability healthy across accounts.
How Freelancers and Consultants Can Keep a Lean, High-Converting Email List
Most freelancers assume a bigger email list means more business. Usually it means the opposite. Here's how to trim yours down to people who actually open, click, and reply — and keep it that way.
Transactional vs. Marketing Emails: Why They Need Different Verification Rules
Running the same email verification rule on OTPs and newsletters causes problems on both sides — slow transactional mail, or a dirty marketing list. Here's why these two email types need separate checks, and how to set each one up correctly.
How Email Verification Reduces Fraud and Fake Account Signups
Fake signups aren't just harmless clutter — bots, disposable emails, and stolen-card testing all slip through unverified signup forms, quietly costing you money and inbox reputation. Here's how email verification catches them before they ever become a problem.