Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
21stcenturydental.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-17 19:44:03 UTC · ↺ Refresh
MX Hostnames
- mx-01.tntsupport.net
MX Priorities
- mx-01.tntsupport.net: 10
A / AAAA Records
- 45.55.38.142 ↩ host-3.tntsupport.net
Mail Server IPs
- 8.40.242.176 ↩ mail-01.tntsupport.net
SOA Record
Raw SOA
ns.21stcenturydental.com alertsnew.13x5.com 1769283018 10800 3600 604800 10800
Primary NS (mname)
ns.21stcenturydental.com
Admin Email (rname)
alertsnew@13x5.com
Serial
1769283018
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
10800s
Nameservers (NS)
ns.21stcenturydental.com
SPF Record
✓ Soft Fail (~all)
v=spf1 +mx include:spf.ess.barracudanetworks.com include:e2ma.net ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; adkim=r; aspf=s
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- e2ma-verification=usxeb
- SPFv=spf1 +mx include:spf.ess.barracudanetworks.com include:e2ma.net ~all
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