Email Blacklist Checker

Emails can be blocked because of the sending server's IP address or because of the domain in the From address and links. Enter a domain or email address and this checker tests the domain on URI blacklists (SURBL and NordSpam), finds its mail servers (MX) and web server, and checks their IP addresses on 19 IP blacklists.

How to use Email Blacklist Checker

1. Enter a domain or an email address.
2. Click Check.
3. Review the domain lists and each server's results, and follow the links to request delisting where needed.

When it comes in handy

• Troubleshooting emails that land in spam.
• Checking a domain before buying it or using it for newsletters.
• Checking after a website hack, since hacked sites often get their domain listed.

Frequently asked questions

My MX servers are Google or Microsoft. Does this matter?

The MX servers receive your mail; your outgoing mail may use other servers. Check the IP your emails are actually sent from (it is in the headers of a sent email) with the IP Blacklist Checker, and use the Email Header Analyzer to find it.

What else affects deliverability?

SPF, DKIM and DMARC records. Check them with the SPF, DKIM & DMARC Checker.