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How to Authenticate Your Domain Name on LWS

How to authenticate your domain name on LWS for systeme.io

Introduction

LWS is a French registrar and hosting provider where you manage your domain’s DNS zone. To send email campaigns and sequences from systeme.io, you must authenticate your domain by adding 3 CNAME records and 1 TXT (DMARC) record. Help article 7851 explains the steps on both systeme.io and in the LWS customer panel.

This guide covers Case 1: sending email through systeme.io’s built-in autoresponder. Connecting a domain for funnels or blogs uses different CNAMEs (see LWS connect guides)—that is separate from email authentication.

Prerequisites

  • A systeme.io account.
  • A domain name registered or hosted with LWS and access to its DNS zone.
  • An active website linked to the domain (systeme.io requirement).
  • A custom domain only—you cannot authenticate Gmail, Yahoo, ProtonMail, etc.

Important: A domain can be authenticated in only one systeme.io account or sub-account. If it is already verified elsewhere, adding it will fail ( general domain authentication, article 316).

Step 1: Generate Records in systeme.io

  1. Hover your profile picture → Settings → Emails.
  2. Click the link to authenticate your domain.
  3. Enter your domain without www (e.g. team-sio.fr).
  4. Click Save to generate the three CNAME records.
  5. Refresh the page if needed, then click the eye icon to reveal the full list: 3 CNAME + 1 TXT (DMARC).

Copy each value from the popup—they are unique to your account. Do not reuse example values from help articles.

Step 2: Add CNAME Records on LWS (7851)

  1. Log in to your LWS customer area (panel.lws.fr).
  2. Click Manage next to the domain you want to authenticate.
  3. Under Domain management, open DNS zone for that domain.
  4. For each of the three CNAMEs from systeme.io:
    • Type: CNAME.
    • Name: Paste from systeme.io but enter only the part before your domain name (e.g. si942517 if the full host is si942517.yourdomain.com).
    • Value: Paste the target from systeme.io and add a period (.) at the end.
    • Click Add to save.

Illustrative examples only (yours will differ):

  • Name si942517 → Value key1.systeme.io.
  • Name systemeio2._domainkey → Value key2.systeme.io.

Repeat for all three CNAME records.

Step 3: Add DMARC TXT on LWS

  1. In the same DNS zone, add a new record.
  2. Type: TXT.
  3. Name: _dmarc (as shown in the Name column in systeme.io).
  4. Value: e.g. v=DMARC1; p=none; rua=mailto:you@yourdomain.com—replace the reporting address with an inbox you monitor.
  5. Click Add.

Dedicated DMARC guide: How to Add a DMARC Record on LWS (4342). How to Create a DMARC Record (2241) explains p=none.

Step 4: Verify Authentication

  1. Wait for DNS propagation (often minutes to 48 hours).
  2. In systeme.io Settings → Emails, status should change to Verified.
  3. Check DMARC with a tool such as MXToolbox DMARC.
  4. Confirm your sender email address (e.g. contact@yourdomain.com).

Case 2: Your Own SendGrid Account

If you are not using systeme.io’s autoresponder and send through your personal SendGrid account, the DNS records in article 7851 do not apply. Contact SendGrid support for domain authentication instructions on LWS.

Connect SendGrid in systeme.io: Generate SendGrid API key and add to systeme.io (134).

LWS-Specific Notes

  • Trailing dot on CNAME Values—common reason status stays Pending if omitted.
  • Name field—do not paste the full host.yourdomain.com if LWS already appends the domain.
  • LWS mail + systeme.io—if you also use LWS email hosting, do not remove existing MX/SPF records without understanding the impact.
  • Funnel / subdomain— Connect your LWS subdomain to systeme.io (4343) uses different CNAMEs than email auth.
  • One _dmarc TXT—avoid duplicate conflicting DMARC records.

Troubleshooting

Issue Fix
Still Pending after 48 hours Re-check all 3 CNAMEs + TXT; trailing dot; correct domain in LWS zone.
CNAME rejected Name = prefix only; remove conflicting record on same host.
DMARC not found Name _dmarc; single TXT entry.
Domain already in use Remove auth from other systeme.io account or use another domain.
Emails not sending Complete auth + sender confirmation + deliverability rules.

Frequently Asked Questions

Is authentication required?

Yes to send from systeme.io (7851 / 316).

How many records?

3 CNAME + 1 TXT DMARC.

CNAME Name field?

Host prefix only, not the full FQDN.

Period at end of Value?

Yes for CNAME on LWS (7851).

Where is DNS zone?

Manage → DNS zone in the LWS panel.

Related Resources

Add the CNAME and TXT _dmarc records in your LWS DNS zone, wait for Verified in systeme.io, then send mail in line with Gmail, Yahoo, and Microsoft bulk sender requirements.

Last updated: July 3, 2026

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