MailTester.com

An instant check tool to verify the deliverability and validity of one email address at a time before sending a critical message.

The core service, enabling the upload of large lists for comprehensive analysis and cleaning to reduce bounce rates.

Provides developer access (including libraries for PHP, Python, Ruby, C#) for integrating real-time validation into web forms.

Automatically identifies and eliminates redundant or duplicate contacts within an uploaded list during the cleaning process.

Proactively searches for and removes known or suspected spam trap email addresses that can destroy sender reputation.

Detects and removes temporary or "burner" email addresses often used to gain access to gated content.

Advanced technique used to correctly verify email addresses on servers that employ grey-listing as a spam prevention mechanism, improving verification accuracy.

Eliminates email addresses that match a database of previous users who have marked emails as spam, protecting sender reputation.

Removes emails associated with high-risk keywords or suspicious Top-Level Domains (TLDs).

Allows users to send a test email and determine its exact destination (inbox, spam folder) across major email providers.

Continuously tracks the user's sending domains and IP addresses against global blocklists and provides alerts upon detection.

Enables multiple users within an organization to verify lists and use credits from a single, shared account pool.