NOC | Postmaster

This page is intended for network administrators, mail server administrators, postmasters, abuse desks and security teams interacting with Specialist Linux Solutions infrastructure.

If you are a customer seeking technical support, please use our regular support channels available through our website.

IP and Domain Reputation Lookup

Use the tools below to verify whether an IP address or domain is currently listed in our internal protection systems.

Why Was My IP Address Blocked?

IP addresses may be temporarily or permanently blocked when our monitoring systems detect activity that may negatively impact the security, stability or reputation of our infrastructure.

Examples include:

• Spam transmission;
• Open relays;
• Malware activity;
• Botnet participation;
• Phishing campaigns;
• High complaint rates;
• Excessive invalid recipients;
• Authentication failures;
• Repeated policy violations.

Whenever possible, notifications are sent to the responsible contacts identified through WHOIS, abuse contacts or other publicly available records.

Repeated incidents or lack of corrective action may result in longer-term blocks.

Why Was My Domain Blocked?

We generally avoid blocking domains whenever possible.

However, domain-based blocks may be applied when:

• Multiple abusive IPs rotate under the same domain;
• Spam campaigns frequently change infrastructure;
• Phishing activity is detected;
• Malware distribution is identified;
• Domain reputation becomes severely compromised.

Domain blocks are typically used only when IP-based controls are insufficient.

Delisting Procedure

If your IP address or domain has been blocked, please contact: [email protected]

Include:

• A detailed explanation of the issue;
• Root cause analysis;
• Corrective actions implemented;
• Relevant timestamps;
• Affected IPs and domains;
• Evidence that the issue has been resolved.

Requests containing only removal demands without technical details may be rejected.

Our abuse team reviews all requests individually.