---
title: "Blacklist & reputation check — Lemwatch Help"
description: "Checks your domain and mail-sending IPs against Spamhaus, Barracuda, SORBS, and 15 other RBLs — alerts within minutes of a listing."
canonical: "https://lemwatch.com/help/blacklist-reputation-check"
source: "https://lemwatch.com"
---

# Blacklist & reputation check

> Checks your domain and mail-sending IPs against Spamhaus, Barracuda, SORBS, and 15 other RBLs — alerts within minutes of a listing.

## Quick answer

 Lemwatch queries 18 major DNSBLs for your MX IPs and apex A records every 6 hours. Any listing raises a **severity: high** incident with the RBL name and delisting URL.

## What it checks

- Spamhaus SBL/XBL/PBL

- Barracuda, SORBS, UCEPROTECT L1-3

- SURBL, URIBL for URL-based lists

- Historical listings (last 30 days) shown in a timeline

## Where to find it in Lemwatch

 **Site details → Security → Reputation.**

## How to respond

- Click through to the RBL's delisting form.

- Fix the root cause (compromised mailbox, forwarder loop, malware) before requesting delisting.

- Wait 24-72 hours for delisting to propagate.

- Acknowledge once cleared.

## FAQ

### Why 18 lists and not 100?

 Most obscure RBLs have poor accuracy — we curate to reduce false positives.

### Can I add my own RBL?

 Agency+ plans support custom RBL hosts.

## Related

- DMARC record check

- Malware detection

- Why did my SSL grade drop


## Related

- [Help centre](https://lemwatch.com/help)
- [DMARC record check](https://lemwatch.com/help/dmarc-record-check)
- [Malware & Threat Detection](https://lemwatch.com/help/malware-detection)
- [Why did my SSL grade drop?](https://lemwatch.com/help/why-ssl-grade-dropped)
- [Open port scan check](https://lemwatch.com/help/open-port-scan-check)
- [HSTS header check](https://lemwatch.com/help/hsts-header-check)
- [Lemwatch pricing](https://lemwatch.com/pricing)
- [Where do I follow Lemwatch product updates?](https://lemwatch.com/help/blog-and-changelog-updates)