polytron.com

Valid Email Server
Domain Lookup › polytron.com

Domain Overview

DNS: ✓ 20d ago Checker: ✓ 20d ago
polytron.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-21 01:04:17 UTC · ↺ Refresh

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MX Hostnames

  • d115782b.ess.barracudanetworks.com
  • d115782a.ess.barracudanetworks.com

MX Priorities

  • d115782a.ess.barracudanetworks.com: 10
  • d115782b.ess.barracudanetworks.com: 15

A / AAAA Records

  • 151.101.66.159 (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 ns63.worldnic.com namehost.worldnic.com 125070810 10800 3600 604800 3600
Primary NS (mname)
ns63.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125070810
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns64.worldnic.com
ns63.worldnic.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:50.168.211.99 ip4:50.168.211.98 ip4:50.168.211.103 ip4:50.168.141.190 ip4:167.89.11.197 include:spf.protection.outlook.com include:_spf.salesforce.com include:spf.ess.barracudanetworks.com include:44977804.spf03.hubspotemail.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 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

5 records
  • sending_domain1011951=9ecc28972cd56c751aca6262083a48d4a83871fb8385220ac684ef7502cd73f9
  • google-site-verification=sCH2AjTapckQFKS51Ky0CCs2q9ciy2Vq45z_qCTfZgI
  • pardot1011951=ae9d0c72570343548df8e78ac4006efc72055b707bdbdc0d251a666e24853312
  • logmein-verification-code=b0ec6f18-6f6b-4827-86cc-bda7a6e21275
  • SPFv=spf1 ip4:50.168.211.99 ip4:50.168.211.98 ip4:50.168.211.103 ip4:50.168.141.190 ip4:167.89.11.197 include:spf.protection.outlook.com include:_spf.salesforce.com include:spf.ess.barracudanetworks.com include:44977804.spf03.hubspotemail.net -all
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