A blacklist is a database of addresses seen sending spam. Mail servers query it before accepting a message, so being listed usually does not mean “mail goes to spam” but “mail is refused”: the receiver says no before it ever sees the text.
You can be listed by server address or by a domain appearing in your links — the second happens to people who sent nothing themselves but whose domain was mentioned in someone else's campaign.
We deliberately do not offer a blacklist checker: Spamhaus and most DNSBLs refuse public resolvers, so a “clean” answer through them would mean “nobody listened to us”, not “you are not listed”. Lying about that is worse than not doing it.
Received.A request filed without fixes gets rejected — and repeat requests are handled more slowly. So first:
Every list has its own form, and nearly all ask the same thing: the address or domain, what happened, and what you did about it. Be specific — “fixed it” without detail does not work.
Timing: Spamhaus usually answers within hours, others take days. A second listing after a delisting is treated far more strictly.
The internal lists of Gmail, Outlook and Yandex have no delisting form at all. The only route is to stop doing whatever hurt your reputation and wait for it to recover on its own. That is weeks, not hours, and throughout it volume must stay low and list quality high.
Which is why not getting listed is cheaper: see staying out of spam and Gmail limits for a safe pace.
If you send through your own Gmail, you cannot land on a public DNSBL by server address: Google's addresses are not yours and are not listed. Your risk is different — domain reputation and Google's own internal limits, up to a temporary sending block. That is cured by pace and list quality, not by delisting requests.
A blacklist (DNSBL) is a database of addresses seen sending spam. Mail servers query it before accepting a message, so a listing usually does not mean «mail goes to spam» but «mail is refused»: the receiver says no before it ever sees the text.
Through check.spamhaus.org, by IP and by domain, and through Google Postmaster Tools for what Gmail thinks of you. A public blacklist checker cannot be trusted: Spamhaus and most DNSBLs refuse public resolvers, so a «clean» answer through one means «nobody listened to us», not «you are not listed».
Usually one of four: a bought or scraped list containing spam traps, a sudden jump in volume, a complaint rate above 0.3%, or a compromised account or server — the most common cause for an IP address.
Fix the cause first: stop sending entirely, find what happened, rotate passwords and revoke third-party access, check SPF and DMARC, and clean the list. A delisting request filed without fixes gets rejected, and repeat requests are handled more slowly.
No. The internal lists of Gmail, Outlook and Yandex are the most important ones and the only ones absent from every public database — they cannot be checked from outside at all. Google Postmaster Tools is the closest thing to a window into Gmail’s view of you.
A pause between messages, a daily cap, one-click unsubscribe and a suppression list per sheet — MailSharks does all of it for you.
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