Explore CRM workflows, sales follow-ups and customer stories.
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A free email validator for your browser, API and AI assistant
Use Heffl's email validator without an account or API key, and understand exactly what each check establishes.
October 3, 2026
Email validation vs mailbox verification: what a check actually proves
Understand syntax, MX records, SMTP acceptance and catch-all domains before treating an email address as deliverable.
October 3, 2026
Connect an email validator to AI assistants with a public MCP server
Add Heffl's no-auth email_verify tool to compatible assistants, or integrate its public HTTP API into a personal agent.
August 28, 2025
How Al Banan Saved 200+ Hours a Month Using Heffl
August 18, 2025
What Makes a Great Salesperson (From a Founder Who Had to Learn It)
August 15, 2025
Why B2B Companies Should Use LinkedIn (From a Former Skeptic)
August 8, 2025
Heffl vs Folk: Which WhatsApp-First CRM Works Better for Your Business?
August 7, 2025
Leads vs Deals: What’s the Difference in a CRM?
July 31, 2025
The Most Customizable CRM for Small Businesses (That No One Talks About)
July 26, 2025
Free Quotation Generator – Create Professional Quotes in Minutes
January 6, 2024
