: A list of 100k names yielding only 2 valid results suggests the dataset is likely "dirty," comprised of old, fake, or improperly formatted entries.

: The ability to distinguish between truly valid addresses and "catch-all" or "risky" ones. Speed : Processing times for large datasets.

Verifalia : Useful for identifying risky emails like honeypots and spamtraps within bulk lists.

EmailListVerify : Offers a free tier (100 verifications) and supports bulk uploads for cleaning "dirty" lists. Key Performance Criteria When reviewing these tools, testers typically look at:

: Most tools accept standard file types like .txt , .csv , and .xlsx . Recommended Tools for 100k Lists