Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
landmark-sc.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 12:07:55 UTC · ↺ Refresh
MX Hostnames
- d53373a.ess.barracudanetworks.com
- d53373b.ess.barracudanetworks.com
MX Priorities
- d53373b.ess.barracudanetworks.com: 20
- d53373a.ess.barracudanetworks.com: 10
A / AAAA Records
- 198.185.159.144 (no PTR)
- 198.185.159.145 (no PTR)
- 198.49.23.144 (no PTR)
- 198.49.23.145 (no PTR)
Mail Server IPs
- 209.222.82.253 ↩ mail.ess.barracuda.com
- 209.222.82.252 ↩ mail.ess.barracuda.com
- 209.222.82.255 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
ns97.worldnic.com namehost.worldnic.com 124091813 10800 3600 604800 3600
Primary NS (mname)
ns97.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
124091813
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns97.worldnic.com
ns98.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com include:_spf.psm.knowbe4.com include:spf.US.exclaimer.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; pct=100
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
7 records- DMARCv=DMARC1; p=none; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
- 3al4quebcuvi951u1o7blrjh13
- sophos-domain-verification=b1506e19c06dc7b20ffbd906735b70cee76209d2f22b5af72a1f4749c9e5da51
- SPFv=spf1 include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com include:_spf.psm.knowbe4.com include:spf.US.exclaimer.net -all
- duo_sso_verification=pK97kwvb0uOHCJnUSzRdzXzY05ZsjwY4tzSCHzGNAoG0AE9RuUZNrCU3yOh8EGoj
- google-site-verification=sLD1NG36RwPu0hLUFeXenyy9Ldp6i8l3S559nlx_kvI
- MS=ms84430477
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 landmark-sc.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits