Is gsa-online.de safe to use as a vendor?

gsa-online.de scored 78/100 on LynxRadar's security posture assessment. The domain partially meets security requirements with some gaps to address. 6 checks passed, 6 warnings, 0 critical issues across 16 passive checks including TLS, DMARC, security headers, breaches, and CVEs.

What TLS version does gsa-online.de use?

gsa-online.de uses TLSv1.3 with TLS_AES_256_GCM_SHA384. TLSv1.3 negotiated with TLS_AES_256_GCM_SHA384 (256-bit). Strong configuration with no deprecated protocols or weak ciphers detected.

Does gsa-online.de have DMARC configured?

Yes. gsa-online.de's DMARC policy is set to 'reject'. SPF record: yes. Strengths: DMARC policy set to reject (strongest); DMARC pct=100 — policy applies to all mail; SPF soft-fail (~all) configured; SPF DNS lookup count: 0/10 (within limit); DKIM configured (selectors: default). Issues: DMARC has no aggregate report URI (rua) — policy violations won't be reported.

Does gsa-online.de have SPF configured?

Yes. SPF record: v=spf1 ip4:149.5.4.213 ~all

Does gsa-online.de have security headers configured?

gsa-online.de has 0 of 0 recommended security headers. All recommended headers present.

Does gsa-online.de use HSTS?

No. Could not fetch https://gsa-online.de — connection failed or timed out.

Has gsa-online.de been involved in a data breach?

No known breaches found. No known breaches found in public disclosure databases.

Does gsa-online.de have known CVE vulnerabilities?

No server software versions detected in HTTP response headers. This is good practice (version hiding) but means CVE exposure cannot be assessed from external signals alone.

Is gsa-online.de's SSL certificate valid?

Yes. Strengths: Certificate valid, 82 days remaining; Issued by Let's Encrypt.

gsa-online.de Security Report — Grade C+ (78/100)

Q: Does gsa-online.de have DNSSEC enabled?

No. Strengths: 2 nameservers configured (jule.ns.cloudflare.com, carl.ns.cloudflare.com); SOA record present and MNAME consistent with NS set; 1 MX record(s) present; Zone transfers properly restricted on all nameservers; Address records present: 1 A record(s). Issues: All nameservers are from a single provider (cloudflare.com) — a provider outage takes down the domain; DNSSEC not configured — DNS responses can be spoofed or tampered with in transit (DNS cache poisoning).

C+

Trust rating

Fair · 78/100

Procurement snapshot

No critical findings. The 5 remaining items are configuration gaps, not architectural problems.

Strengths

DMARC / Email Security

TLS Configuration

Known Breaches

TLS Protocol Support

Questions to ask

Confirm backup mail server configuration

Estimated remediation effort: 1–2 days

Based on a passive external scan — supplement with vendor-provided attestations, not a replacement.

Trust Score Trend

→ No change 1 scan · Last scanned August 28, 2026

Score

100 75 50 25 0

C+

gsa-online.de

78/100

Compliance & Certifications

Not yet verified

SOC 2 Type II

Audit report not on file

3rd party · AICPA

Pro subscribers only

ISO 27001

Certificate not on file

3rd party · accredited body

Pro subscribers only

GDPR

DPA not on file

Self-reported

Pro subscribers only

CCPA

Self-reported

Pro subscribers only

Incident History

None in 12 months

March 2026

ChatGPT data exposure

1 source

Resolved

Pro subscribers only

April 2023 – Feb 2026

ChatGPT data exposure

1 source

Resolved

Pro subscribers only

Security Posture

5 items need attention

6 passed

Add a backup mail server record

MX Records & Mail Provider

30 minutes

This is a business-continuity gap — a single point of failure for all inbound email. gsa-online.de only has one mail server listed to receive email. If that single server has an outage, incoming email has nowhere else to go — it gets delayed or bounced back to the sender until the server recovers.

How to fix this

1Ask your email provider whether they publish a second/backup mail server address (most do).

2Add it as a second MX record in your domain's DNS settings (check with whoever manages your website or domain registration), with a higher priority number than your main one (higher number = lower priority = used only as backup).

3Confirm it worked: search "mx record checker" and enter gsa-online.de — you should see 2 or more records.

Report unlocked.

View all 6 passed checks

DMARC / Email Security

TLS Configuration

Known Breaches

TLS Protocol Support

Certificate Hygiene

CVE Exposure

Company Signals

Claim profile →

Operational risk

Low

11 yrs operating. Well-funded

Lynxradar · Composite signal

Last funding

$40B

Series F · Mar 2025 · SoftBank-led

Crunchbase ↗

Employees

~3,000

+40% YoY growth

LinkedIn ↗

Trust Resources

Claim profile →

Trust Center

trust.gsa-online.de ↗

Security page

gsa-online.de/security ↗

gsa-online.de/privacy ↗

DPA (Data Processing Agreement)

gsa-online.de/dpa ↗

Updated recently

Subprocessors List

gsa-online.de/policies/subprocessors ↗

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Medium Priority

Warn

Strengths: Mail handled by gsa-online.de; 1 MX record(s) configured. Issues: Only 1 MX record — no failover if primary mail server is unavailable.

Likelihood: ★★☆☆☆

Impact: ★★☆☆☆

Not enabled

Strengths: 2 nameservers configured (jule.ns.cloudflare.com, carl.ns.cloudflare.com); SOA record present and MNAME consistent with NS set; 1 MX record(s) present; Zone transfers properly restricted on all nameservers; Address records present: 1 A record(s). Issues: All nameservers are from a single provider (cloudflare.com) — a provider outage takes down the domain; DNSSEC not configured — DNS responses can be spoofed or tampered with in transit (DNS cache poisoning).

Likelihood: ★★☆☆☆

Impact: ★★★☆☆

Warn

Issues: No MTA-STS configured — email in transit is vulnerable to TLS downgrade attacks; sending servers cannot verify your mail server requires TLS; No TLSRPT record (_smtp._tls) — TLS delivery failures won't be reported to the domain owner.

Likelihood: ★★☆☆☆

Impact: ★★★☆☆

Warn

Could not load gsa-online.de's homepage to detect its e-commerce platform, payment processor, or CDN.

Best Practice

Warn

No CAA records found in the DNS tree for this domain. Without CAA, any Certificate Authority can issue certificates for this domain. Adding CAA records restricts issuance to authorised CAs only, reducing the risk of misissued certificates.

Likelihood: ★☆☆☆☆

Impact: ★☆☆☆☆

Warn

No security.txt found. Publishing a security.txt at /.well-known/security.txt is the industry standard (RFC 9116) for vulnerability disclosure policies. Its absence may indicate a less mature security program.

Likelihood: ★☆☆☆☆

Impact: ★☆☆☆☆