costacontracting.com

Valid Email Server
Domain Lookup › costacontracting.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
costacontracting.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-19 06:37:22 UTC · ↺ Refresh

MX Hostnames

  • d355907b.ess.barracudanetworks.com
  • d355907a.ess.barracudanetworks.com

MX Priorities

  • d355907b.ess.barracudanetworks.com: 20
  • d355907a.ess.barracudanetworks.com: 10

A / AAAA Records

  • 104.21.1.57 (no PTR)
  • 172.67.128.161 (no PTR)
  • 2606:4700:3033::6815:139 (no PTR)
  • 2606:4700:3037::ac43:80a1 (no PTR)

Mail Server IPs

  • 209.222.82.253 ↩ mail.ess.barracuda.com
  • 209.222.82.255 ↩ mail.ess.barracuda.com
  • 209.222.82.252 ↩ mail.ess.barracuda.com

SOA Record

Raw SOA dean.ns.cloudflare.com dns.cloudflare.com 2397159394 10000 2400 604800 1800
Primary NS (mname)
dean.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397159394
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

rosalyn.ns.cloudflare.com
dean.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 +a +mx +a:linweb1003.infoquesthost.com include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

DKIM Selectors

✗ None detected

No 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

1 record
  • SPFv=spf1 +a +mx +a:linweb1003.infoquesthost.com include:spf.protection.outlook.com -all
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