Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
backhaus-hackner.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 13:07:12 UTC · ↺ Refresh
MX Hostnames
- mailserver.sperl.de
MX Priorities
- mailserver.sperl.de: 10
A / AAAA Records
- 216.150.1.193 (no PTR)
Mail Server IPs
- 62.245.246.67 ↩ mailserver.sperl.de
SOA Record
Raw SOA
ns1110.ui-dns.de hostmaster.1und1.com 2017060146 28800 7200 604800 600
Primary NS (mname)
ns1110.ui-dns.de
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060146
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns1037.ui-dns.biz
ns1118.ui-dns.org
ns1103.ui-dns.com
ns1110.ui-dns.de
SPF Record
✓ Strict (-all)
v=spf1 mx a ip4:62.245.246.64/27 ip4:87.139.38.86/32 ip4:145.253.116.162/32 include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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
2 records- SPFv=spf1 mx a ip4:62.245.246.64/27 ip4:87.139.38.86/32 ip4:145.253.116.162/32 include:spf.protection.outlook.com -all
- MS=ms44691271
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