IP & Domain Reputation Checker

IP & Domain Reputation Checker

Use the Cape Portal IP & Domain Reputation Checker to check whether an IP address or domain is currently reported by the blacklist checks used by MxToolbox. This can be useful when a business is experiencing email delivery problems, bounced messages or concerns about the reputation of a mail server.

Enter your domain name or the IP address of your website or mail server above and run the check. The tool returns a simple result showing whether any of the checked blacklist services reported a listing at the time of the lookup.

What Is an IP or Domain Reputation Check?

An IP or domain reputation check looks for reports that may affect how internet services treat an address or domain. For email, blacklist and DNSBL systems can be used by receiving mail servers as one of several signals when deciding whether a message should be accepted, rejected or sent to spam.

A reputation problem does not automatically mean that a website is hacked or that every email will be rejected. It means that a particular reputation or blacklist service has reported an issue that should be investigated.

What Does the Cape Portal Reputation Checker Check?

Cape Portal sends the entered IP address or domain to the MxToolbox blacklist checking service and reports the result returned at the time of the check.

• Blacklist listings reported for the IP address or domain.
• The number of blacklist checks that passed.
• Warnings or incomplete checks returned by the service.
• Details of reported listings when the service provides them.

Why Check Your Mail Server IP Reputation?

If business emails are being rejected, delayed or delivered to spam, checking the sending IP reputation is one useful troubleshooting step. A mail server IP that appears on a blacklist may have an impact on email delivery, depending on the receiving provider and the particular blacklist involved.

For businesses using a hosting company or email provider, the sending IP may belong to that provider rather than to the website itself. If a listing is found, the provider may need to investigate and request removal after the underlying problem has been addressed.

What If Your IP or Domain Is Blacklisted?

Start by identifying the blacklist that reported the listing and read the reason supplied by that service. Possible causes can include unwanted email, compromised email accounts, malware, poor mail-server configuration, shared hosting reputation or other sending-related problems.

Do not immediately assume that the website itself is the cause. Check the sending mail server, email accounts, DNS records and recent sending activity, and contact your hosting or email provider when the IP is managed by them.

IP Blacklist Checker for Small Businesses

Cape Portal is designed to make common website and small-business checks easier without requiring technical knowledge. This IP blacklist checker gives you a quick starting point when you need to investigate a possible email reputation problem.

The result is a point-in-time check. Blacklist databases can change, different providers use different criteria, and a clear result does not guarantee that an IP address or domain is trusted by every email provider.

Frequently Asked Questions

Can I use this as a domain blacklist checker?

Yes. Enter a domain such as yourdomain.co.za and the checker will perform the available blacklist checks for that domain.

Can I check an IPv4 address?

Yes. Enter the IPv4 address of the server or mail service you want to investigate.

Can I check an IPv6 address?

Yes. The checker accepts IPv6 addresses as well as IPv4 addresses.

Can I enter a full website address?

Yes. You can enter a website address such as https://yourdomain.co.za. The checker is designed to use the domain or IP address for the reputation lookup.

Does a blacklist listing mean my website has been hacked?

No. A blacklist listing is a reason to investigate, but it does not by itself prove that a website has been hacked. The cause could be related to email accounts, a mail server, shared hosting or another sending issue.

Does a clear result guarantee good email delivery?

No. Email delivery also depends on SPF, DKIM, DMARC, reverse DNS, mail-server configuration, sending behaviour and the policies of the receiving email provider.

How often should I check my IP or domain reputation?

There is no single schedule that suits every business. A check can be useful when email delivery problems appear, after a suspected compromise or when you are investigating a sudden increase in bounced or rejected messages.

Important: Cape Portal reports the blacklist information returned by the service used for the check. It does not certify that an IP address or domain is universally safe, trusted or free from every possible reputation problem.