DNSBL Monitoring
Monitor the reputation of your IP addresses on blocklists.
Status: Lab This feature is currently in the Lab phase. This means we are still actively optimizing intervals and the selection of lists.
DNSBL (DNS-based Blocklist) Monitoring regularly checks whether your server's IP address is listed on one of the known "Blacklists" (Blocklists/RBLs). Being listed on such a list often has serious consequences for email delivery (mails land in spam or are rejected).
How it works
We use our own open-source engine uptimeify-dnsbl to check your IP address against over 50 international spam databases.
Check Interval
Currently, we perform the check every 180 minutes (3 hours).
- Reason: DNSBL operators often block excessive queries ("Rate Limiting"). A 3-hour rhythm is a good compromise between timeliness and "Good Citizenship" towards list operators.
- Note: If there is a real need for more frequent checks, please contact us.
What happens if a match is found?
If we find your IP on a list (e.g., Spamhaus, Barracuda, SORBS):
- Notification: You receive an alert via your configured channels.
- Details: We show you the specific reason (e.g., "Listed in SBL" or "Dynamic IP Range").
- Solution: Where available, we provide a direct Delisting Link through which you can request removal from the list operator.
Supported Lists
We query a curated list of reliable providers. A complete overview can be found on the page Used Lists.
Domain Expiry Monitoring
An expired domain is one of the most severe incidents that can happen to a website. Once a domain expires, the entire online presence becomes unreachable — and in the worst case, the domain is registered by a third party. Our Domain Expiry Monitoring helps you proactively prevent this.
Used RBL Lists
We currently monitor your IP addresses against the following lists. This selection covers the most important and reliable international anti-spam databases.