russbrown.com

Valid Email Server
Domain Lookup › russbrown.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
russbrown.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-23 16:37:22 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 162.159.135.42 (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-1.mimecast.com
  • 170.10.132.242 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.128.141 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com

SOA Record

Raw SOA ns-67.awsdns-08.com awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-67.awsdns-08.com
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-725.awsdns-26.net
ns-1079.awsdns-06.org
ns-1826.awsdns-36.co.uk
ns-67.awsdns-08.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:us._netblocks.mimecast.com include:relay.kinstamailservice.com -all
📊 DNS lookups: 3/10
✓ 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

5 records
  • SPFv=spf1 include:spf.protection.outlook.com include:us._netblocks.mimecast.com include:relay.kinstamailservice.com -all
  • 0ed1fe018a32f6254e30bd494a9c308600e7a63948
  • MS=ms15495420
  • duo_sso_verification=2DLxYDGfrYqCrCzxaF8uU1jf8UM5AQoQc1JiqTSFthII87KJJjU67PMWRC7cXBgx
  • knowbe4-site-verification=f56b8bfd5d93f2f97f10dfbcbcf25574
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