Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rdmarina.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 07:08:48 UTC · ↺ Refresh
MX Hostnames
- rdmarina-com.mail.protection.outlook.com
MX Priorities
- rdmarina-com.mail.protection.outlook.com: 0
A / AAAA Records
- 104.165.111.101 ↩ host01.treeo.com
Mail Server IPs
- 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
- 52.101.41.28 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 52.101.41.56 ↩ mail-sj0pr21cu00100.inbound.protection.outlook.com
- 52.101.194.15 ↩ mail-ch4pr21cu00107.inbound.protection.outlook.com
- 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c92c::1 ↩ mail-dm6pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:c91d::b ↩ mail-mw2pr02cu00603.inbound.protection.outlook.com
- 2a01:111:f403:c922::2 ↩ mail-bl0pr02cu00702.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.treeo.com nevin.superior-host.com 2026021901 3600 1800 1209600 86400
Primary NS (mname)
ns1.treeo.com
Admin Email (rname)
nevin@superior-host.com
Serial
2026021901
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns1.treeo.com
ns2.treeo.com
SPF Record
✓ Strict (-all)
v=spf1 +a +mx +ip4:104.165.111.101 +include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- NETORGFT1623369.onmicrosoft.com
- SPFv=spf1 +a +mx +ip4:104.165.111.101 +include:spf.protection.outlook.com -all
- MS=ms96425713
- gl448874p3dksusjbiodcvsb5n
- MS=ms43710807
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for rdmarina.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits