MailerCheck review
Low-cost email verification with APIs, batch checks, content analysis, and integrations.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
MailerCheck is an email validation service for businesses that need to clean subscriber lists, screen addresses before collection, or check contacts before sending. It supports single-address checks, CSV and TXT uploads, web access, and an API for real-time or asynchronous verification. Results cover valid, catch-all, role-based, disposable, typo, mailbox-full, and mailbox-not-found statuses. It is best suited to teams seeking low-cost verification with additional campaign and inbox analysis.
The published Pay as you go plan charges $0.01 per credit on a one-time basis, with one credit representing one email verification. Credits do not expire, which suits occasional list cleaning as well as recurring validation workflows. There is no free plan. Beyond core verification, credits can support Email Insights campaign-content analysis, Inbox Placement testing across mailbox providers, and usage reports for UI, integrations, and API checks.
MailerCheck fits email operations that already use MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, or Make. Its API supports both synchronous and asynchronous verification, while CSV and TXT uploads cover batch work without requiring an integration. The product is less suitable for buyers specifically seeking verified SMTP mailbox checking or ongoing DMARC and Blocklist monitoring, as those monitoring services were retired on May 15, 2026. Choose it when flexible verification and extras matter more than a free entry tier or broader monitoring coverage.
MailerCheck pros and cons
- Where it wins
- $0.01 per credit with credits that do not expire
- Real-time, asynchronous, and batch verification options
- Seven integrations plus Email Insights and Inbox Placement testing
- Where it doesn't
- No free plan for evaluating the service
- SMTP mailbox checking is not verified
- DMARC and Blocklist monitoring were retired on May 15, 2026
MailerCheck fact sheet, pricing and score →
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