SuperTool free vs paid?

Free version: on-demand checks, manual entry. Paid (MXToolbox subscription): automated daily monitoring, alerts when listing detected, more granular history. Free is enough for occasional checks; paid for production mail infrastructure where catching listings within hours matters.

Showing some lists but not Spamhaus — bad?

Less bad than Spamhaus alone. Smaller lists (RATS, BACKSCATTERER, etc.) affect fewer receivers. Spamhaus is the dominant list. Priorities: Spamhaus first, then Barracuda + SORBS, then niche lists. SuperTool's list shows priority but doesn't enforce — use your judgment.

Quick health-check command alternative to SuperTool?

Command-line: `dig +short .zen.spamhaus.org` (returns 127.0.0.X if listed). Script multiple lists for batch check. Less polished but scriptable into monitoring. SuperTool is convenient; CLI works for automation.

Daily monitoring — set up how?

Cron + script that hits SuperTool API or queries lists directly. Alerts via email/Slack on hit. Or use MXToolbox monitoring (paid feature), Hetrix Tools (free tier), DNSBL.info auto-checker. Pick one that alerts via channel you actually read.

SuperTool Blacklist: How to Check and Manage Domain/IP on Blacklists

4 min read

13.04.2026

SuperTool, offered by services like MXToolbox, is a comprehensive tool for checking domain and IP blacklist statuses. It scans various real-time blacklists (RBLs) to see if your domain or IP is flagged, which can help troubleshoot email deliverability and reputation issues.

SuperTool MXToolbox Blacklist Check — SuperTool — all-in-one mail/DNS diagnostic from MXToolbox.

For closely related blacklist topics, see BlacklistAlert — Understanding and Resolving, SORBS Delisting, BlacklistAlert.org Tool, and 550 5.7.1 Spamhaus Client Host Blocked.

What Is a Blacklist Check with SuperTool?

Purpose: Identifies if your domain or IP is listed on any spam or reputation blacklists.
Functionality:
- Scans major blacklist databases (Spamhaus, Barracuda, SpamCop, etc.).
- Provides information about why the domain/IP is flagged.
- Offers delisting guidance if flagged.

How to Use SuperTool for a Blacklist Check

Access MXToolbox SuperTool

https://mxtoolbox.com/SuperTool.aspx

Enter Your Domain or IP

Input your domain name (e.g., example.com) or IP address (e.g., 123.45.67.89).

Select "Blacklist Check"

From the dropdown, choose Blacklist Check or let the tool auto-detect issues.

View Results

The tool will:

List all blacklists checked.
Highlight any blacklists that flagged your domain or IP.

What to Do If You Are Blacklisted

Investigate the Cause

Check Email Logs

Identify spam or unauthorized activities from your domain/IP.
Use commands like:
For Postfix:
```
sudo tail -f /var/log/mail.log
```
For Exim:
```
sudo tail -f /var/log/exim_mainlog
```

Scan for Malware

Use tools like ClamAV to scan your web server for malicious files.

Verify Email Authentication

Ensure SPF, DKIM, and DMARC records are correctly configured.

Resolve Issues

Remove Spam Sources

Disable compromised accounts and reset passwords.
Remove malicious scripts or files from your server.

Set Up Email Authentication

SPF: Specifies which mail servers can send emails for your domain.

v=spf1 include:_spf.google.com ~all

DKIM: Adds digital signatures to validate email integrity.
DMARC: Defines policies for email authentication failures.

_dmarc.example.com TXT "v=DMARC1; p=quarantine; rua=mailto:reports@example.com"

Limit Outbound Emails

Restrict the number of emails sent per hour to prevent spam-like behavior.

Request Delisting

Visit the Blacklist Provider Website

The SuperTool results will often include direct links to the blacklist provider removal page.

Submit a Delisting Request

Provide details about the resolved issue.

Example providers:

Spamhaus: Removal Center
Barracuda: Delisting Request
SpamCop: Blacklists

Prevent Future Blacklisting

Monitor Your Reputation

MXToolbox Monitor

Continuous monitoring of your blacklist status.

Google Postmaster Tools

Monitor your domain email reputation.

Microsoft SNDS

Smart Network Data Services for reputation monitoring.

Implement Security Best Practices

Secure Email Accounts

Enforce strong passwords and enable 2FA.

Regular Malware Scans

Automate scans with ClamAV or similar tools.

Rate Limit Outgoing Emails

Prevent excessive or spam-like email sending.

Ensure Proper Server Configuration

Check for open relays:

telnet mail.example.com 25

Disable relaying for unauthorized users.

Example Use Case

Scenario: Your emails to Gmail and Yahoo are bouncing back, and MXToolbox indicates your IP is listed on Spamhaus.

Steps Taken:

Check Logs: Found a compromised email account sending spam.
Resolve Issues: Disabled the account and reset its password. Updated SPF, DKIM, and DMARC records.
Request Delisting: Submitted a delisting request to Spamhaus with evidence of issue resolution.
Monitor: Set up email alerts for future blacklisting.

Benefits of Using SuperTool

Comprehensive Checks

Scans multiple blacklists at once.

Delisting Assistance

Provides links and guidelines for delisting.

Reputation Monitoring

Helps maintain your email deliverability and domain reputation.

MXToolbox SuperTool is a valuable resource for identifying and resolving blacklist issues. Regularly monitor your domain and IP reputation, maintain strong email security practices, and address any issues promptly to prevent future blacklisting.