Domain Overview
DNS: ✓ 2d ago
Checker: ✓ 2d ago
gre-rail.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 06:53:52 UTC · ↺ Refresh
MX Hostnames
- grerail-com0i.mail.protection.outlook.com
MX Priorities
- grerail-com0i.mail.protection.outlook.com: 0
A / AAAA Records
- 18.194.228.146 ↩ io.mediatis.de
- 2a05:d014:c62:4402:dd59:ecc3:7962:fcdc (no PTR)
Mail Server IPs
- 52.101.73.15 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
- 52.101.73.24 ↩ mail-as8pr05cu00300.inbound.protection.outlook.com
- 52.101.73.2 ↩ mail-as9pr07cu00302.inbound.protection.outlook.com
- 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:ca04::f ↩ mail-db7pr03cu00507.inbound.protection.outlook.com
- 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1103.ui-dns.org hostmaster.1und1.com 2017060180 28800 7200 604800 600
Primary NS (mname)
ns1103.ui-dns.org
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060180
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns1103.ui-dns.org
ns1058.ui-dns.biz
ns1048.ui-dns.de
ns1031.ui-dns.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com ip4:195.145.20.2 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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 include:spf.protection.outlook.com ip4:195.145.20.2 -all
- knowbe4-site-verification=3c18fbd74590a2e3989546dd8c3aabb8
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