Guides, tutorials, and insights on email validation, deliverability, and API integration.
SPF, DKIM, and DMARC alignment is required by Gmail, Yahoo, and Microsoft. Here's the exact DNS setup with verification commands for developers.
The EU AI Act requires disclosure when AI generates content people interact with. Here's what that means for AI-written cold email sequences.
Most ecommerce stores pay for 20-30% dead contacts in their ESP. Here's how email list hygiene cuts your marketing bill and improves deliverability.
ARC email authentication preserves SPF and DKIM results across forwarders so DMARC survives. Here's how Authenticated Received Chain works and why it matters.
CAN-SPAM penalties reach $53,088 per email. Use this CAN-SPAM compliance checklist every cold outreach team needs before sending.
Mailchimp free plan limits in 2026: 250 contacts, 500 sends/month. Here's how list cleaning keeps you under the cap, plus when to switch ESPs.
BIMI lets you show your brand logo in Gmail and Apple Mail. Common Mark Certificates skip the VMC trademark requirement. Here's the full setup.
Gmail caps your spam complaint rate at 0.3% but recommends 0.1%. Here's exactly how to monitor, diagnose, and fix a rising spam rate.
Klaviyo now charges for every non-suppressed profile, not just the ones you email. Here's how the billing change works and how to keep your costs down.
Microsoft enforces SPF, DKIM, and DMARC for bulk senders to Outlook.com. Here's what changed, the technical setup, and how to test compliance.
Gmail permanently rejects emails from non-compliant senders since Nov 2025. Here's what SDRs and outreach teams need to do to stay in the inbox.
Gmail, Yahoo, and Microsoft now reject emails failing DMARC. Here's what changed, what developers need to configure, and how to test your setup.
Klaviyo charges per active profile. Invalid emails inflate your bill without generating revenue. Here's how to audit your list and cut costs immediately.
We ran 10,000 Apollo.io contacts through email validation. 22% were undeliverable. Here's the full breakdown by industry, title, and domain type.
Build automated email validation workflows in n8n. Validate on form submit, clean lists on schedule, and route results to your CRM without code.
Protect your WooCommerce membership site from fake signups and failed renewal emails with real-time email validation at registration and checkout.
Role-based emails like info@, sales@, and support@ tank cold email reply rates. Here's the data on why, and how to filter them before your next sequence.
Validate emails on WordPress forms without bloated plugins. Use lightweight JavaScript and API calls to catch fake signups and protect your list.
B2B email lists lose 2-3% of valid addresses monthly. Calculate your list's decay rate and build a re-verification schedule that keeps bounces under 2%.
Invalid emails in your Shopify store cost more than bounces. They inflate ESP bills, poison deliverability, and hide real customer data from your reports.