Why this matters now
An unprotected domain creates three real problems.
Email providers and security reviews now expect every business to lock down its domain. When yours isn't, it shows up in three ways.
Your email goes to spam
When your domain isn't verified, providers like Gmail and Outlook stop trusting it. Invoices, password resets and replies start landing in spam, and you usually find out only when a customer says they never got your email.
Scammers can pose as you
Without protection, anyone can send emails that appear to come from your address. They use this to send fake invoices and urgent requests to your own clients and suppliers, in your name.
You fail the security review
Insurers, larger clients and PCI rules increasingly ask you to prove your domain is protected, and they ask again at every renewal. Without ongoing proof, contracts and renewals get held up.
How it works
Set up in stages, so your real email keeps working.
Switching protection on too quickly blocks your own legitimate email. We move in steps and check the data before tightening anything.
Send us your domain
Reply to one email with your domain name. Within a day you get a free one-page report showing where you're exposed and what needs fixing.
We set up the protection
We give you the exact settings to add, or add them for you. This verifies your real email senders and starts collecting data on who sends from your domain.
We turn on full protection
Once every legitimate sender is covered, we tighten the policy in stages until impersonation is blocked completely and your domain is fully protected.
We keep it working
Every new tool you connect can break the setup and push your email back to spam. We catch it before it costs you a customer, block impersonation attempts, and send you a short report each month.
The safe path to protection
Pricing
One monthly price per domain.
Month-to-month. Cancel whenever you like. Pick the level of help that suits you.
For teams happy to add a few settings themselves, with us telling you exactly what to paste.
- ✓ 1 domain
- ✓ Full setup to protected status
- ✓ We send the exact records, you paste them
- ✓ Monthly one-page report
- ✓ Support over email
For teams who would rather we handle the setup directly, start to finish.
- ✓ Up to 2 domains
- ✓ We make the changes for you
- ✓ Priority response
- ✓ Impersonation alerts
- ✓ Logo-in-inbox (BIMI) setup
For finance, healthcare and teams who have to prove protection to auditors, insurers or clients.
- ✓ Everything in Managed
- ✓ Multiple domains
- ✓ Monthly report you can hand straight to an auditor
- ✓ Deliverability and blocklist monitoring
- ✓ Same-day response
Free setup on every plan until the end of 2026. Normally €250.
How we work
A focused service that does one thing well.
Nicheline handles email authentication and nothing else. That focus means quicker setups, fewer mistakes, and someone who already knows your domain when you write in.
Everything runs on a fixed monthly schedule and is handled in writing, so there's nothing to book and nothing falls through the cracks. Our own domain is set up the same way we'd set up yours, so feel free to check it before you decide.
Free, no commitment
See where your domain stands.
Reply with your domain name and we'll send back a free one-page report: your current setup, where you're exposed, and the steps to fix it.
Get your free report →