Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ribbeckcompanies.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 17:42:32 UTC · ↺ Refresh
MX Hostnames
- ribbeckcompanies-com.p20.mxthunder.net
- ribbeckcompanies-com.p40.mxthunder.net
- ribbeckcompanies-com.p30.mxthunder.net
- ribbeckcompanies-com.p10.mxthunder.com
MX Priorities
- ribbeckcompanies-com.p10.mxthunder.com: 0
- ribbeckcompanies-com.p40.mxthunder.net: 10
- ribbeckcompanies-com.p20.mxthunder.net: 5
- ribbeckcompanies-com.p30.mxthunder.net: 5
A / AAAA Records
- 172.67.153.110 (no PTR)
- 104.21.74.24 (no PTR)
- 2606:4700:3037::6815:4a18 (no PTR)
- 2606:4700:3037::ac43:996e (no PTR)
Mail Server IPs
- 216.172.106.27 ↩ bolt111a.mxthunder.net
- 209.41.68.145 ↩ bolt111b.mxthunder.net
SOA Record
Raw SOA
itzel.ns.cloudflare.com dns.cloudflare.com 2399289744 10000 2400 604800 1800
Primary NS (mname)
itzel.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399289744
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
margo.ns.cloudflare.com
itzel.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 a:mail.ribbeckcompanies.com include:spf.protection.outlook.com include:spf.spamhero.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=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: 216 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
1 record- SPFv=spf1 a:mail.ribbeckcompanies.com include:spf.protection.outlook.com include:spf.spamhero.com -all
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 ribbeckcompanies.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits