Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mrhollandsair.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 17:08:42 UTC · ↺ Refresh
MX Hostnames
- d273075a.ess.barracudanetworks.com
- d273075b.ess.barracudanetworks.com
MX Priorities
- d273075b.ess.barracudanetworks.com: 5
- d273075a.ess.barracudanetworks.com: 1
A / AAAA Records
- 172.67.136.66 (no PTR)
- 104.21.26.125 (no PTR)
- 2606:4700:3036::ac43:8842 (no PTR)
- 2606:4700:3035::6815:1a7d (no PTR)
Mail Server IPs
- 209.222.82.252 ↩ mail.ess.barracuda.com
- 209.222.82.253 ↩ mail.ess.barracuda.com
- 209.222.82.255 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
kipp.ns.cloudflare.com dns.cloudflare.com 2396490439 10000 2400 604800 1800
Primary NS (mname)
kipp.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2396490439
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
walk.ns.cloudflare.com
kipp.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.constantcontact.com include:amazonses.com include:in.constantcontact.com include:_spf.psm.knowbe4.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; fo=1; rf=afrf; rua=mailto:[email protected],mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected],mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected],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
6 records- knowbe4-site-verification=35a06503da0bff6cee035d806f0a5bd1
- SPFv=spf1 include:spf.protection.outlook.com include:spf.constantcontact.com include:amazonses.com include:in.constantcontact.com include:_spf.psm.knowbe4.com -all
- MS=ms68954481
- apple-domain-verification=VYIJIpqdvjfYdRXA
- google-site-verification=NtpYuuS2RZGnQhBXebC_cqK7UTBbaRt-TGg7llS-Y9U
- google-site-verification=rda6DubtiSXUxTIi-hIdsSSrcCFu1n1gd8YNqAUw-VE
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