How to authenticate your domain name on LWS

📅 Last updated: June 2026

⏱ 4 min read

✅ All plans

Adding digital cryptographic signatures to your domain's DNS zone is a mandatory technical requirement to authorize SystemeScale as an approved sender on your behalf. This article details how to deploy the required CNAME verification records specifically within the LWS hosting interface.

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Prerequisite Requirements

Domain authentication is strictly required to route emails from our shared network pools.
The domain you are authenticating must resolve to an active, working website homepage (not an error frame). If mailbox providers detect an empty root URL, your campaign delivery will be heavily filtered.
You cannot authenticate generic webmail addresses (e.g., Gmail, Yahoo, ProtonMail). Only custom top-level domains (e.g., @yourdomain.com) can be cryptographically signed.

Step 1: Generate your security parameters in SystemeScale

Before modifying anything in LWS, you must pull the unique CNAME strings assigned to your workspace.

Navigate to Email Settings

Hover your cursor over your profile picture in the top navigation panel, click on Settings, and select the Emails tab on the left sidebar. Scroll down to the Domains section and click the link labeled: "Click here to authenticate your domain name".

Input your root domain

A modal window will appear. Type your custom domain exactly as registered, omitting any "www" or "https://" prefixes (e.g., simply yourdomain.com), and click Save.

Copy the CNAME and TXT generated records

The system will instantly calculate and display a table containing three CNAME rows and one TXT row (for DMARC). Keep this modal tab open; you will copy and paste these exact values into LWS during Step 2.

Domain authentication

Please add these CNAME and TXT records to your domain's DNS zone to authenticate it.

Type

Name

Value

CNAME

si942517.team-sio.fr

inbound.systeme.io.

CNAME

systemeio1._domainkey.team-sio.fr

key1.systeme.io.

CNAME

systemeio2._domainkey.team-sio.fr

key2.systeme.io.

TXT

_dmarc.team-sio.fr

v=DMARC1; p=none; rua=mailto:exemple@gmail.com

Step 2: Deploy records inside your LWS hosting account

You must now bridge the connection by inserting the generated parameters into your LWS control panel. If you cannot locate your domain management area, contact LWS support directly.

Access LWS DNS Zone Settings

Log into your central LWS customer portal. Locate your custom domain directory list, click Manage next to your active domain, navigate to the Domain Management menu block, and open the DNS Zone settings panel.

Deploy the three CNAME rows

Select the CNAME option to initiate a new record line. Copy the data from SystemeScale following this strict formatting rule:

Name field: Paste ONLY the characters that appear before your domain name (the subdomain prefix). For example, if SystemeScale shows si942517.team-sio.fr, you must enter strictly si942517.
Value field: Paste the full value provided by SystemeScale and ensure you append a trailing period (.) at the end of the string. For example: inbound.systeme.io.

Repeat this exact process to create the second and third CNAME rows.

Deploy the DMARC TXT record

Change the record type selector to TXT. In the Name field, enter exactly _dmarc. In the Value field, paste the DMARC string provided in the popup window. For a detailed guide on this specific record, see: How to add a DMARC record on LWS.

Step 3: Verification and Confirmation

Once you have saved all four records inside LWS, DNS network propagation can take a few hours to complete globally. To verify your setup, use the independent DNS Checker tool.

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Checking Verification Loops

To scan your records, you must enter the full CNAME hostname (including your domain name suffix) into the DNS Checker search bar. If the map renders green checkmarks for all three CNAME rows, your domain architecture is successfully authenticated. Contact our customer support team to trigger the final system-side verification block.

If any of your CNAME rows trigger a red error flag, return to LWS to ensure there are no trailing space formatting errors and that you appended the required period (.) to the value fields. If issues persist, take a screenshot of your LWS zone layout and open a ticket with our support engineers.

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Final Activation Requirement

Even after successful authentication, you cannot broadcast automated emails until you confirm your active sender address inbox. Complete this final step by following: How to confirm your email sender address.

Note on Custom SendGrid Deployments: If you process high-volume lists using a personal SendGrid dedicated IP architecture rather than our native shared pools, please contact SendGrid documentation support directly for their specific LWS integration strings.

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📄Why aren't my emails being sent?→ 📄How to confirm your email sender address→ 📄How to improve the deliverability of my emails (advanced tips)→ 📄Why do my emails arrive in the Gmail 'promotions' tab?→ 📄How to add a DMARC record on LWS→