Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ruhrsau.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-03 10:58:32 UTC · ↺ Refresh
MX Hostnames
- mail4.mailhosting.a1a-server.de
MX Priorities
- mail4.mailhosting.a1a-server.de: 10
A / AAAA Records
- 136.243.145.108 ↩ ds1.ssdhosting-budget.as-vserver.de
- 2a01:4f8:171:13eb::2 ↩ ds1.ssdhosting-budget.as-vserver.de
Mail Server IPs
- 185.115.179.153 ↩ mail4.mailhosting.a1a-server.de
- 2a02:74a0:a008:2011:f816:3eff:fe35:bbb1 ↩ mail4.mailhosting.a1a-server.de
SOA Record
Raw SOA
ns1.aditsystems.hosting support.aditsystems.de 2021033164 86400 3600 1209600 1800
Primary NS (mname)
ns1.aditsystems.hosting
Admin Email (rname)
support@aditsystems.de
Serial
2021033164
Refresh
86400s
Retry
3600s
Expire
1209600s
Minimum TTL
1800s
Nameservers (NS)
ns3.aditsystems.hosting
ns1.aditsystems.hosting
ns2.aditsystems.hosting
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.a1a-server.de -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; sp=quarantine; adkim=s; aspf=s;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: quarantine
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
2 records- SPFv=spf1 include:_spf.a1a-server.de -all
- MS=ms62908860
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