MailerCheck

Overview

MailerCheck is an email verification and deliverability platform created by email deliverability experts with over 10 years of experience in marketing and transactional email delivery. Originally launched as an email verification tool, MailerCheck has evolved into a comprehensive suite of deliverability tools that help businesses maintain their sender reputation and reach more inboxes. The platform has served over 218,765 customers worldwide and is a sister company of MailerLite, a leading email marketing platform with over 1 million customers.

What differentiates MailerCheck from other email verification tools is its focus on providing detailed, actionable reports that clearly categorize email addresses as allowed, risky, or do not send, with specific reasons for each status. The platform can identify more types of problematic emails than many competitors, including syntax errors, disposable addresses, role-based emails, spam traps, and full mailboxes. Beyond basic verification, MailerCheck offers a full suite of deliverability tools including campaign content analysis, inbox placement testing, DMARC reporting, and blocklist monitoring. For newsletter creators who depend on email deliverability to reach their audience and protect their sender reputation, MailerCheck provides both preventive maintenance and diagnostic tools to ensure maximum inbox placement.

Best For

MailerCheck is ideal for newsletter creators, email marketers, and businesses of all sizes who need to maintain clean email lists and protect their sender reputation. The platform works particularly well for creators who have inherited old subscriber lists, experienced increasing bounce rates, or notice declining open rates that might indicate deliverability problems. Newsletter creators who send regularly and want to avoid paying their email service provider for invalid addresses will appreciate the pay-as-you-go pricing model that allows periodic list cleaning without monthly commitments. The platform is also valuable for creators who integrate with MailerLite, Mailchimp, or ActiveCampaign and want seamless list cleaning within their existing workflow.

Key Features

• Comprehensive Email Verification: MailerCheck analyzes email lists to identify and remove problematic addresses including invalid emails, syntax errors, disposable emails, role-based addresses, spam traps, and full mailboxes. The verification process is fast and allows you to view results while the check is in progress, making it easy to clean lists of any size without waiting for the entire process to complete before taking action.

• Detailed Verification Reports: The platform provides clear, actionable reports that categorize each email address as allowed, risky, or do not send, with specific reasons for each status. These detailed breakdowns help newsletter creators make informed decisions about which subscribers to keep, which to monitor, and which to remove immediately, rather than just receiving a simple pass or fail verdict.

• Multiple Verification Methods: MailerCheck supports three verification approaches to fit different workflows: single email address checking for quick validations, bulk list uploads via CSV or TXT files for periodic cleaning, and real-time API verification that filters out bad addresses as they're collected through signup forms. This flexibility allows creators to maintain list quality both proactively and reactively.

• Email Insights Campaign Analysis: The platform includes a campaign analysis tool that checks email content before sending, identifying spam words, broken links, HTML validation errors, and sender authentication issues. This pre-send analysis helps newsletter creators fix deliverability problems before they impact inbox placement, essentially serving as a quality control checkpoint that catches issues that might send emails to spam folders.

• Inbox Placement Testing: MailerCheck allows you to send test emails to major mailbox providers including Gmail, Outlook, Yahoo, and AOL to verify where your emails actually land. This placement testing reveals whether your newsletters reach the inbox, promotions folder, or spam folder across different email clients, helping you understand how various providers treat your content.

• DMARC Reporting and Monitoring: The platform provides real-time reports about domain activity and sending sources, allowing you to troubleshoot sending issues and identify unauthorized or potentially harmful activity before it impacts your reputation. DMARC monitoring helps prevent phishing and spoofing scams that could damage your sender reputation and future deliverability.

• Automated Blocklist Monitoring: MailerCheck automatically checks your IP addresses and domains against the most impactful blocklists, sending immediate alerts if you appear on any. The platform also provides specific instructions for getting delisted, allowing you to take swift action before your sender reputation suffers lasting damage from being flagged as a spam source.

• Native Integration Support: The platform integrates directly with email marketing tools including MailerLite, Mailchimp, ActiveCampaign, Kit, and GetResponse, allowing seamless list cleaning without manual CSV uploads and downloads. For custom workflows, MailerCheck offers a developer-friendly API and Zapier integration to connect with thousands of other applications.

• Duplicate Detection and Credit Efficiency: MailerCheck automatically ignores duplicate email addresses in your uploaded lists and does not charge credits twice for the same address. This smart handling saves money on verification costs and ensures you're only paying for unique email addresses, even if your list contains multiple entries for the same subscriber.

Pricing

MailerCheck offers flexible pricing with both pay-as-you-go and monthly subscription options to accommodate different usage patterns. All new accounts receive 200 free credits to test the platform without entering payment information. Pay-as-you-go pricing starts at $0.01 per credit for 1,000 to 5,000 credits, with volume discounts bringing costs down to $0.006 per credit for 50,000 to 100,000 credits, and credits never expire. Monthly subscriptions start at $20 per month for 2,500 credits, scaling up to $36 for 5,000 credits, $64 for 10,000 credits, $96 for 15,000 credits, and $128 for 20,000 credits. For creators who need advanced deliverability features beyond verification, MailerCheck offers subscription plans starting at $125 per month for the Basic plan with 66 blocklist monitors and 10 DMARC domains, $275 per month for Premium with 5 users and 20 domains, and $975 per month for Enterprise with unlimited users and domains. Newsletter creators focused solely on list verification can use the free account with pay-as-you-go credits, avoiding monthly commitments entirely.