https://www.emailawesome.com/
Bulk Email Verifier & List Cleaning Tool | EmailAwesome
Stop hard bounces before you hit send. EmailAwesome is the fastest bulk email verifier to clean your lists, block spam traps, and protect your domain...
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https://www.phpclasses.org/package/13-PHP-Determine-if-a-given-e-mail-address-is-valid-.html
Bulk Email Verifier PHP script with class PHP Email validation: Determine if a given e-mail address...
Class that may be used to determine if a given e-mail address is valid. It features: Simple validation just by looking at the e-mail address string, Validation...
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https://convertinsight.com/
Email Verifier - Bulk Email Verifier & Checker
Accurately verify emails in bulk. The top tool for checking mail address authenticity.
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