Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
aachener-swg.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 04:33:38 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-02-eu-central-1.prod.hydra.sophos.com: 20
- mx-01-eu-central-1.prod.hydra.sophos.com: 10
A / AAAA Records
- 93.184.63.105 ↩ a00462-1.host.tro.net
Mail Server IPs
- 18.159.237.67 ↩ ec2-18-159-237-67.eu-central-1.compute.amazonaws.com
- 52.57.79.230 ↩ ec2-52-57-79-230.eu-central-1.compute.amazonaws.com
SOA Record
Raw SOA
ns-a.tro.net hostmaster.tro.net 2025092404 43200 7200 1209600 86400
Primary NS (mname)
ns-a.tro.net
Admin Email (rname)
hostmaster@tro.net
Serial
2025092404
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-b.tro.net
ns-d.tro.net
ns-a.tro.net
ns-c.tro.net
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:194.8.199.67 include:_spf_eucentral1.prod.hydra.sophos.com include:spf.protection.outlook.com include:spf-de.emailsignatures365.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; fo=0; adkim=s; pct=100; rf=afrf; sp=reject
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Strict
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
8 records- sophos-domain-verification=f8f513f63d4ed2bf2b8a3eeff76df786cb84507c924e4865bc4aca6d9aac4de0
- MS=BB8D160CACDA61E3CB5EE1A1B395E5B8DC3FF506
- SPFv=spf1 mx ip4:194.8.199.67 include:_spf_eucentral1.prod.hydra.sophos.com include:spf.protection.outlook.com include:spf-de.emailsignatures365.com -all
- duo_sso_verification=yBGmXP7u0d02FdsDVn3ryTZSwyY6pkFnt3V45QtOantjuL3drBSEnQSnx87fUyiQ
- apple-domain-verification=2uMjSqgsbJ7AdMQC
- sophos-domain-verification=d15bdac165513eff3d30b6ea79fa2ea2c86ea689
- brevo-code:c8bd3fdfb0a1250e5eda762512c06f1a
- _b4ddq6sep1s82zx359ql8lipqyw6zsx
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