castotech.com

Valid Email Server
Domain Lookup › castotech.com

Domain Overview

DNS: ✓ 2d ago Checker: ✓ 2d ago
castotech.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-19 07:39:23 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

  • us-smtp-inbound-2.mimecast.com: 20
  • us-smtp-inbound-1.mimecast.com: 10

A / AAAA Records

  • 162.159.140.166 (no PTR)

Mail Server IPs

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

SOA Record

Raw SOA ns21.domaincontrol.com dns.jomax.net 2025092400 28800 7200 604800 3600
Primary NS (mname)
ns21.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2025092400
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns21.domaincontrol.com
ns22.domaincontrol.com

SPF Record

✓ Soft Fail (~all)
v=spf1 include:us._netblocks.mimecast.com include:spf.protection.outlook.com ip4:40.129.73.59 ip4:40.129.73.60 ip4:96.66.177.1 ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate 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

8 records
  • 67526krbajigdolql4fle29d17
  • iOfXHPUCaURewGw6wSZMZuncormDjQdYxvSqsbyyXZoPHWkNwjYje2ns0zZcJA5VtvxJthy3p3xxRGBpnBODTg==
  • apple-domain-verification=ebj4TXHu90dOOJfd
  • hqh4n9anr24d64on6s49k4vgic
  • 2g8lesmin9fqs2hdv7rh873fe0
  • SPFv=spf1 include:us._netblocks.mimecast.com include:spf.protection.outlook.com ip4:40.129.73.59 ip4:40.129.73.60 ip4:96.66.177.1 ~all
  • MS=ms29120980
  • BqFdBHZ5tvpokbbcWerEk75H/eSe1KhpLgdQcog1YVl6AsuE6LBdIhMITdPFvqFanUMBlJEcXQeUS9Sjo2Kl9A==
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