What are Real-time Blackhole Lists (RBL)?
This tool checks your IP address or domain against over 50 major Real-time Blackhole Lists (RBLs) and DNSBLs. It helps system administrators identify if their mail server is flagged for spam, malware, or poor reputation, which directly impacts email deliverability.
What is an IP Blacklist (RBL)?
An RBL is a dynamic list of IP addresses suspected of sending spam. Mail servers use these lists to automatically block or filter malicious emails before they reach the inbox.
Why is my server IP listed on an RBL?
IPs get listed due to spam complaints, compromised accounts, malware infections, or being part of a provider's dynamic IP range.
How can I remove my IP from a blacklist?
First, secure the source of the spam. Then, request a delisting directly through the specific RBL provider's website. Some lists delist you automatically after a period of clean traffic.
How often are RBL databases updated?
Most major RBL providers update their databases in real-time or near-real-time. New spam sources are added within minutes, and delisted IPs are removed typically within 24-48 hours after the spam stops.