Question 1

What is a DNS blacklist (DNSBL)?

Accepted Answer

A DNS blacklist is a database of domains and IP addresses flagged for sending spam. Email servers check these lists to decide whether to accept, reject, or filter incoming emails. Being listed can severely impact deliverability.

Question 2

How do I get removed from a blacklist?

Accepted Answer

Each blacklist provider has its own delisting process. After fixing the issue that caused the listing (spam complaints, compromised server, etc.), visit the provider's website and submit a delisting request. Our tool provides direct links to each provider.

Question 3

How often should I check my domain for blacklisting?

Accepted Answer

Weekly checks are recommended for regular email senders. If you send high volumes or notice sudden drops in deliverability, check immediately.

Question 4

Can I check both domain and IP addresses?

Accepted Answer

Yes. The tool auto-detects whether you enter a domain name or an IPv4 address and checks both against 50+ major DNS blacklists.

Domain & IP Blacklist Checker

Frequently Asked Questions

Improve Your Email Deliverability

Domain & IP Blacklist Checker

Frequently Asked Questions

What is a DNS blacklist (DNSBL)?

How does this blacklist checker work?

What should I do if I'm listed on a blacklist?

Can I check both domains and IP addresses?

How often should I check my blacklist status?

Is this blacklist checker free?

Improve Your Email Deliverability