Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sdu.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-04 14:32:58 UTC · ↺ Refresh
MX Hostnames
- sdu-de.mail.protection.outlook.com
MX Priorities
- sdu-de.mail.protection.outlook.com: 10
A / AAAA Records
- 37.27.105.29 ↩ static.29.105.27.37.clients.your-server.de
Mail Server IPs
- 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
- 52.101.68.3 ↩ mail-db7pr03cu00403.inbound.protection.outlook.com
- 52.101.68.15 ↩ mail-db6pr03cu00107.inbound.protection.outlook.com
- 52.101.68.27 ↩ mail-db7pr03cu00503.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:ca04::7 ↩ mail-db4pr02cu00307.inbound.protection.outlook.com
- 2a01:111:f403:ca09::7 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
- 2a01:111:f403:ca09::b ↩ mail-am7pr05cu00103.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.ht-support.net jhansen.ht-support.de 2024091800 43200 7200 1209600 600
Primary NS (mname)
ns1.ht-support.net
Admin Email (rname)
jhansen@ht-support.de
Serial
2024091800
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
600s
Nameservers (NS)
ns2.ht-support.net
ns1.ht-support.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.mailjet.com a:mail2.fla.de -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100
✓ 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
4 records- google-site-verification=jVh5LzjYgxK6u8j6rZUU2zJOUVo1viRJvQBWEoUMUSg
- apple-domain-verification=EVfEueE5Pf63fNr3
- SPFv=spf1 include:spf.protection.outlook.com include:spf.mailjet.com a:mail2.fla.de -all
- MS=8C2CB584171CB7602020D910EF16C48F26E335BD
Full email verification for sdu.de
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