Bad addresses in a mailing list hurt deliverability and waste sending quota, and most of them are simple typos — gmial.com, hotmial.com, a trailing comma from a spreadsheet. This validator checks syntax against the practical rules mail servers enforce and flags likely misspellings of common domains.
No. Syntax validation cannot tell you whether an address receives mail — that requires an SMTP or API check against the receiving server. It does remove the addresses that could never work.
Because they are valid and widely used for sub-addressing, as in name+shop@example.com. Rejecting them is a common bug that blocks legitimate users.
Yes, internationalised addresses are standardised, though support across providers is uneven. This tool accepts them rather than rejecting valid addresses outright.
It compares each domain against a list of very common providers using edit distance, so a one or two-character slip is flagged with the likely intended domain.
All free tools · Blog · About · Contact