smbb.com

Valid Email Server
Domain Lookup › smbb.com

Domain Overview

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

Checked via [email protected] · 2026-04-01 04:46:28 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

  • 8.29.155.208 ↩ cloudhost-2083261.us-midwest-1.nxcli.net

Mail Server IPs

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

SOA Record

Raw SOA ns-1246.awsdns-27.org awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1246.awsdns-27.org
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-1246.awsdns-27.org
ns-1892.awsdns-44.co.uk
ns-197.awsdns-24.com
ns-1002.awsdns-61.net

SPF Record

✓ Soft Fail (~all)
v=spf1 include:us._netblocks.mimecast.com ip4:8.29.155.208 include:mailgun.org ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

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
  • google-site-verification=PxS8ZGAtQ3JMVHJ4tkr7K43qEANCmq02OazdYQHL27g
  • SPFv=spf1 include:us._netblocks.mimecast.com ip4:8.29.155.208 include:mailgun.org ~all
  • MS=ms42184589
  • apple-domain-verification=YdinOBaXdd1S9j7n
  • facebook-domain-verification=javmynb2styz5z2httkg2v073vbjd9
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