DNS, MX and blacklist lookup
The tool we use when “the email never arrives”: it shows what other servers see of your domain and why they might reject it.
Alerts
Mail servers (MX)
| Priority | Server | IP | Reverse (PTR) | SMTP / STARTTLS | Blacklists |
|---|
DNS records
| Type | Value |
|---|
Do your emails land in spam or bounce? Get help with email
🔒 Everything runs in your browser or is discarded after the response. We do not store what you type.
Want a full review of your company?
These tools show what is visible from the outside. A T.I. RESCUE pentest or audit covers the rest: systems, people and processes.
Talk to a specialistMore tools
Password generator and strength checker
Generate a strong password in one click, or type yours to see how long it would hold. Nothing leaves your browser.
Try it →Was I hacked? Guided check
Tick what is happening to you. At the end you get the risk level and the steps in order, based on your answers.
Try it →Domain security checker
Passive checks only (DNS, TLS and HTTP headers), the same ones any mail server or browser performs. Graded A to F.
Try it →What is my IP?
This is the address your connection uses on the internet, and what a site sees when you visit.
Try it →ISO 27001 self-assessment
Answer about what exists and works today, not what is planned. It is the short version of the GAP assessment we run with our clients.
Try it →RTO, RPO and downtime cost calculator
Enter your numbers: the result is the cost of your last outage and the targets a continuity plan should set.
Try it →Help desk cost per ticket
With five numbers you already have, you will know whether your support is expensive, overloaded or both.
Try it →CVSS 3.1 calculator
Pick each metric and see the score instantly. The same formula we use in our pentest reports.
Try it →IPv4 subnet calculator
Enter an IP and its prefix. You can also split the network into equal subnets for VLANs or segmentation.
Try it →Cloud speed test
Not your ISP's test: it measures the real path to a server in Europe, like when you use Microsoft 365, a VPN or a cloud system. Close downloads and video calls before measuring.
Try it →Email header analyzer
Ideal for that email “from the boss” or “from the bank” that doesn't add up. Everything is analyzed in your browser.
Try it →Phishing simulator: would you have fallen for it?
Attacks on companies almost always start with a message like these. Two minutes, no sign-up.
Try it →SSL/TLS certificate checker
An expired certificate takes down your website, email and your customers' trust the same day. Check it in seconds.
Try it →