Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cts-umweltsimulation.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 13:54:08 UTC · ↺ Refresh
MX Hostnames
- mx-01-eu-central-1.prod.hydra.sophos.com
- mx-02-eu-central-1.prod.hydra.sophos.com
MX Priorities
- mx-01-eu-central-1.prod.hydra.sophos.com: 10
- mx-02-eu-central-1.prod.hydra.sophos.com: 20
A / AAAA Records
- 212.97.96.192 ↩ cts.extro-media.eu
Mail Server IPs
- 18.159.80.41 ↩ ec2-18-159-80-41.eu-central-1.compute.amazonaws.com
- 52.57.183.85 ↩ ec2-52-57-183-85.eu-central-1.compute.amazonaws.com
SOA Record
Raw SOA
ns.extro-media.de info.extro-media.de 2026011910 10800 3600 604800 3600
Primary NS (mname)
ns.extro-media.de
Admin Email (rname)
info@extro-media.de
Serial
2026011910
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns.extro-media.de
ns3.extro-media.de
ns2.extro-media.de
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:5.7.241.240/29 ip4:178.157.83.11 ip4:212.97.96.192 include:_spf_eucentral1.prod.hydra.sophos.com include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;sp=reject;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];ri=86400;aspf=r;adkim=r;fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
default._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
7 records- sophos-domain-verification=ebd381de72d1f1a1ee7634af159a9cc9714a49ea
- MS=B393B1ED7B830DC0AB14D53014C99D311C386718
- logmein-verification-code=aa1900b9-191c-4f72-a93e-36f59a02a6aa
- sophos-domain-verification=31c098a09c5dbc503be17d3e0eaba8aee106711420670f8a513453413f6f4a37
- google-site-verification=6EB5mcXBQhNNZmmUIcxpBk19abqGg0No3RgRxewJZhQ
- apple-domain-verification=aLGsbQvSUnK4IBqP
- SPFv=spf1 a mx ip4:5.7.241.240/29 ip4:178.157.83.11 ip4:212.97.96.192 include:_spf_eucentral1.prod.hydra.sophos.com include:spf.protection.outlook.com -all
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