csusa.us

Valid Email Server
Domain Lookup › csusa.us

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
csusa.us
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-27 11:28:41 UTC · ↺ Refresh

MX Hostnames

  • us-smtp-inbound-2.mimecast.com
  • us-smtp-inbound-1.mimecast.com

MX Priorities

  • us-smtp-inbound-1.mimecast.com: 10
  • us-smtp-inbound-2.mimecast.com: 10

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.128.141 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.132.141 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.132.242 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.128.221 ↩ us-smtp-inbound-2.mimecast.com

SOA Record

Raw SOA ns1-05.azure-dns.com dnsadmin.comfortsystemsusa.com 205201418 86400 7200 1209600 7200
Primary NS (mname)
ns1-05.azure-dns.com
Admin Email (rname)
dnsadmin@comfortsystemsusa.com
Serial
205201418
Refresh
86400s
Retry
7200s
Expire
1209600s
Minimum TTL
7200s

Nameservers (NS)

ns2-05.azure-dns.net
ns3-05.azure-dns.org
ns4-05.azure-dns.info
ns1-05.azure-dns.com

SPF Record

✓ Strict (-all)
v=spf1 mx:comfortsystemsusa-com.mail.protection.outlook.com ip4:72.32.72.85 ip4:162.242.134.119 ip4:72.32.72.83 ip4:209.85.166.176 ip4:209.85.166.53 ip4:209.85.166.43 ip4:72.32.72.84 include:spf_all.comfortsystemsusa.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

7 records
  • openai-domain-verification=dv-AgOy7TUT5uyoi7odz9CJEQOe
  • BnIdHAOyCQa8HAEFZ8bgjycSLwP0P03kVi9G4TJlj3RWv7GsdIT64QPyjcGVbhgW5kywqu6GUvDfVGAT7sM5eg==
  • MS=ms59177613
  • SPFv=spf1 mx:comfortsystemsusa-com.mail.protection.outlook.com ip4:72.32.72.85 ip4:162.242.134.119 ip4:72.32.72.83 ip4:209.85.166.176 ip4:209.85.166.53 ip4:209.85.166.43 ip4:72.32.72.84 include:spf_all.comfortsystemsusa.com -all
  • MS=ms79977739
  • apple-domain-verification=wyAjmygT9azGnhAz
  • smartsheet-site-validation=QG9MLcKWugt1-g6ODfH9BwzMtdY18xqF
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