Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dt.com
Yes
✓ Yes
Barracuda
No
Yes
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-28 02:40:11 UTC · ↺ Refresh
MX Hostnames
- d261500b.ess.barracudanetworks.com
- d261500a.ess.barracudanetworks.com
MX Priorities
- d261500a.ess.barracudanetworks.com: 10
- d261500b.ess.barracudanetworks.com: 20
A / AAAA Records
- 172.67.149.221 (no PTR)
- 104.21.95.247 (no PTR)
- 2606:4700:3033::ac43:95dd (no PTR)
- 2606:4700:3037::6815:5ff7 (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
lex.ns.cloudflare.com dns.cloudflare.com 2400105163 10000 2400 604800 1800
Primary NS (mname)
lex.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2400105163
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
lex.ns.cloudflare.com
marge.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:_s83499928.fdmarc.net -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected], mailto:[email protected], mailto:[email protected]; ruf=mailto:[email protected], mailto:[email protected], mailto:[email protected]; ri=3600; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected], mailto:[email protected], mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
10 records- smartsheet-site-validation=gCEs0O4qYJrLJ3UxzY7wC1PlawtwFbeD
- SPFv=spf1 include:_s83499928.fdmarc.net -all
- ZOOM_verify_kLleWtcpIf3NUF2GVY0bLs
- apple-domain-verification=g7Z4uFhxmmAXkFNp
- atlassian-domain-verification=P2d6EUdwPiK95FES8Slry4vYPEvrHG4zuhrVrXMKRtsywZfqLsPaa8RH8Ph7Rt9f
- docusign=abddfb43-0bb4-4308-ba85-ba4955eb17be
- google-site-verification=3Vnk2C3chKD1837iRdStAmTZKBJGj-bNa9sALeRinFw
- google-site-verification=EMNBdLPmNJ67mmE_N__naU54dGXgixSAhc2b5H3jsdA
- logmein-verification-code=YhHaUT92mrXs4Go1i62HJsqCc
- mindmanager-verification=ba4d9837ed2fc27f65b291b51101111f2586d8dba9003176449a9801157c24e5
Full email verification for dt.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits