Help Center

Email List Hygiene Best Practices

A clean email list is the foundation of successful email marketing. Here are proven strategies to maintain list quality and protect your sender reputation. 1. …

How Often Should You Verify Your Email List?

Email data degrades over time. On average, 22–30% of email addresses become invalid each year due to job changes, company closures, and abandoned accounts. Here's …

Improving Email Deliverability

Deliverability — the ability to reach the inbox rather than spam — depends on multiple factors. Email verification is a critical piece, but here's the …

Frequently Asked Questions

General Does Mailthentic send actual emails to verify addresses? No. Mailthentic uses the SMTP protocol to communicate with mail servers, but it never sends an …

Glossary of Email Verification Terms

A quick reference for terms used throughout Mailthentic and the email verification industry. Bounce (Hard) A permanent delivery failure. The recipient address doesn't exist …

How Email Verification Works

Email verification is a multi-step process that determines whether an email address is valid, active, and capable of receiving messages. Mailthentic performs up to six …

Single Email Verification

Single verification lets you check one email address at a time. It's ideal for quick lookups, testing, or real-time validation during user signups. How to …

Bulk Email Verification: CSV Upload Guide

Bulk verification lets you upload a list of email addresses and verify them all at once. It's the fastest way to clean an entire mailing …

DNS-Only vs. SMTP Verification Modes

Mailthentic supports two verification modes. Understanding the difference helps you choose the right level of verification for your needs. DNS-Only Mode DNS-only verification checks everything …

Scheduling Recurring Verifications

Keep your email lists perpetually clean by scheduling automatic re-verifications on a regular basis. How Scheduled Jobs Work After completing a bulk verification job, you …

How to Connect Your CRM to Mailthentic

Mailthentic supports direct CRM integration with HubSpot, Salesforce, and Mailchimp. Once connected, you can import contacts for verification and push clean results back — all …

Importing Contacts from Your CRM

After connecting your CRM, you can import entire contact lists for bulk email verification. How to Import Go to CRM Connections and click Import …

Pushing Verification Results Back to Your CRM

After verifying contacts imported from a CRM, you can push the results back to tag or update records in your CRM. How to Push Results …

Requesting a New CRM Integration

Don't see your CRM on the Connections page? You can request it and our team will review it. How to Submit a Request Go …

CRM Integration Security & Data Privacy

We take data security seriously. Here's how Mailthentic protects your CRM data. OAuth 2.0 Authentication Mailthentic connects to your CRM using OAuth 2.0 — …

Managing Your Credits

Credits are the currency used for email verifications on Mailthentic. Here's everything you need to know about how credits work. How Credits Are Used …

Two-Factor Authentication (2FA)

Two-factor authentication adds an extra layer of security to your Mailthentic account by requiring a time-based code in addition to your password. Setting Up 2FA …

Teams and Workspace Management

Mailthentic supports team workspaces, allowing multiple users to share credits and collaborate on verification jobs. Creating a Team Go to Team Settings from your …

Understanding Verification Statuses

Every email Mailthentic verifies receives one of four top-level statuses. Here's what each one means and how you should act on it. Deliverable Safe …

Confidence Scores Explained

Every verification result includes a confidence score — a number that represents how certain Mailthentic is about the result. Higher scores mean greater certainty. Score …

Understanding Catch-All Domains

A catch-all domain (also called an "accept-all" domain) is configured to accept email sent to any address at that domain, whether the specific mailbox exists …

MX Provider Detection

Mailthentic analyzes MX records to identify the email service provider behind each domain. This detection influences how results are interpreted and scored. Detected Provider Types …

Understanding SPF, DKIM, and DMARC Results

Mailthentic checks three critical DNS authentication records for every domain. These records protect against email spoofing and are a key indicator of a domain's email …

What Is Mailthentic?

Mailthentic is an email verification platform that helps businesses validate email addresses before sending campaigns. By checking whether an email address is real, active, and …

Creating Your Account

Follow these steps to create your account and begin verifying emails. Step 1: Sign Up Visit the Sign Up page from the top navigation. …

Quick Start Guide: Your First Verification

This guide walks you through running your first email verification in under a minute. Single Email Verification Log in and navigate to Single Verification …

Navigating Your Dashboard

The Mailthentic dashboard is your command center for all verification activity. Here's a quick tour of what you'll find. Dashboard Overview The main dashboard page …

Why Is My Verification Taking a Long Time?

Most single verifications complete in under 10 seconds, and bulk jobs process at high speed. However, some verifications take longer due to how remote mail …

Why Did I Get an "Unknown" Result?

An "unknown" result means Mailthentic couldn't get a definitive answer from the mail server. Here are the most common causes and what to do about …

Common Verification Errors and What They Mean

Here's a reference guide to the most common verification statuses and error conditions you may encounter. Invalid Statuses invalid_syntax Meaning: The email address doesn't follow …

Insufficient Credits: What Happens?

Understanding what happens when you run low on credits helps you avoid disruptions to your workflow. Single Verification If you try to verify an email …