THE HONEST FAQ.

They are the whole product. Instead of a mystery score, every address comes back with a plain verdict. SEND means mail it, it is safe for your reputation. HOLD means it is a risk, so keep it back or send to it carefully, not in your main push. DROP means dead weight, cut it, mailing it costs you money and hurts your sender rep. A basic check tells you the mailbox exists and makes you decide. We hand you the decision.

Keep it out of your big sends. A HOLD is not a yes and not a hard no, it is a flagged risk. Mail your SEND addresses first, protect your reputation, and treat HOLDs as their own small, careful segment if you want to try them at all. If you only mail SEND, you are already ahead of most senders.

No. And be careful with anyone who says they can. Nobody can promise you the inbox, and anyone who tells you they can is lying to you. What we do is remove the dead weight dragging your sends down and hand you a straight verdict on every address. The inbox you earn from there with good sending. We would rather tell you the truth than sell you a promise no honest tool can keep.

Yes, if it is a real list and it is yours to mail. We validate the addresses. We do not moralise about your business, and we do not lecture. Harder cases that other tools get squeamish about are served quietly and discreetly, same engine, same straight verdict, no fuss. Bring us the list everyone else got nervous about.

A catch-all domain accepts mail for every address, real or not, so a basic check cannot tell you whether a specific mailbox is actually live. That is exactly where most tools shrug and hand you an "unknown". We do not stop there. We weigh the signals and still give you a verdict, SEND, HOLD or DROP, so a catch-all does not turn into a guessing game on your side.

Fast. Your first 1,000 addresses come back in roughly one to five minutes. Bigger lists scale with size, so a large list takes longer, and we will not pretend otherwise or promise you a hard number we cannot hit every time. No fake SLA. You get the verdicts as quickly as the list allows, and you can start mailing your SEND addresses the moment they land.

Your list is yours. We process it, hand it back with the verdicts, and do not hang on to it or sell it. We keep the security and data handling plain and in writing, including where data lives and how deletion works. Read the full detail on the security and data page.

Yes, a real one, and it is in credits, not fine print. Your first 1,000 addresses are free, no card, so you see the verdicts before you pay a cent. Then, if we clear an address to SEND and it hard-bounces, we credit it back so you can re-check it free. Credits never expire. We guarantee our work, never the inbox. Full wording on the guarantee page.

No. Paid credits never expire. You buy them, they sit in your account, and they are there when you need them. No monthly reset, no use-it-or-lose-it clock. And if a SEND address hard-bounces, that credit comes back to you.

Two easy ways. Paste or upload a list and let it run, or wire it into your own stack with the API so addresses get validated automatically. It also drops straight into n8n, Make and Zapier, so you can clean addresses as they come in without touching a spreadsheet. Clean it, then get back to running the business.

Yes. If you are an agency, an ESP reseller or a platform, you can run ListBro under your own name. The attitude and the honesty stay, the brand and the verdict words become your tokens. Ask us on the API and white-label page and we will set you up.

A basic check says the mailbox exists and leaves you to figure out what that means. We give you a decision, not a mystery score. SEND, HOLD or DROP on every address, with a plain reason, so you know exactly what is safe to mail before you hit send. That is the difference between a data dump and an answer.