Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mcnbuild.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 10:05:35 UTC · ↺ Refresh
MX Hostnames
- d223428a.ess.barracudanetworks.com
- d223428b.ess.barracudanetworks.com
MX Priorities
- d223428a.ess.barracudanetworks.com: 10
- d223428b.ess.barracudanetworks.com: 20
A / AAAA Records
- 104.21.43.62 (no PTR)
- 172.67.221.113 (no PTR)
- 2606:4700:3033::ac43:dd71 (no PTR)
- 2606:4700:3035::6815:2b3e (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
alan.ns.cloudflare.com dns.cloudflare.com 2396547146 10000 2400 604800 1800
Primary NS (mname)
alan.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2396547146
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
alan.ns.cloudflare.com
dora.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com ip4:138.197.96.223 include:_spf.brainier.com include:spf.ess.barracudanetworks.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → 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
3 records- MS=ms22922324
- apple-domain-verification=VPs8HUAdYxZjhap4
- SPFv=spf1 include:spf.protection.outlook.com ip4:138.197.96.223 include:_spf.brainier.com include:spf.ess.barracudanetworks.com -all
Full email verification for mcnbuild.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits