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Create a blacklist of unwanted e-mail addresses or websites and search online with the most comprehensive blacklist lookup tool available. Our blacklist checker compares up to 50 lists at once and provides hundreds of thousands of results. Wondering if a domain or address is on one of the hundreds of blacklists? Check right now with this free blacklist site lookup tool.
Easily lookup the source of unidentified emails with this free blacklist checker from Mailtester.com. Enter the sender's email address, and learn whether it is on a blacklist that prevents you from receiving legitimate emails. Is your sender on spamhaus? Are they in a blacklist database?
Check if a URL is on various spam lists or blacklists with this blacklist checker tool. Simply enter a website address in the form below, and we'll return a list of results within moments.