Free Email & Automation Tools for Better Customer Communication

Use Mailendy’s free tools to check email quality, test subject lines, estimate revenue leaks, and improve how your business communicates with leads and customers.

All Tools & Automation

Smart List Extractor

Clean contact lists, organize leads, remove duplicates, get list health, and prepare your data for email outreach without sending files to a server.

Email Spam Checker

Check your subject line and email body for spam triggers, formatting issues, weak CTAs, excessive links, and inbox readiness risks.

Email Subject Line Tester

Score your email subject line for clarity, mobile friendliness, spam risk, curiosity, urgency, and campaign readiness.

Email Automation Flow Planner

Determine what emails to send, when to send them, and what each email should do at every point in your communication journey.

Lost Revenue Calculator

Estimate how much revenue your business may be losing from missed follow-ups, inactive customers, weak retention, and poor automation.

Domain deliverability checker

Check your email domain for SPF, DMARC, MX records, domain readiness, and basic deliverability risks before sending campaigns.

Why We Built These Free Tools

Most businesses do not lose revenue because they have no customers. They lose revenue because communication breaks down.

Leads are not followed up. Emails are poorly written. Subject lines get ignored. Past customers are forgotten. Inquiries go cold. Revenue leaks quietly because there is no proper system running in the background.

Mailendy’s free tools help businesses spot these issues early and understand where better email infrastructure, automation, and customer recovery systems can make a difference.

Who These Tools Are For

Need a Communication System Built Properly?

If your business needs better follow-up, stronger email infrastructure, customer recovery automation, or retention workflows, Mailendy can help you build the system behind your customer communication.