chicagobusiness.com

Valid Email Server
Domain Lookup › chicagobusiness.com

Domain Overview

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

Checked via [email protected] · 2026-03-23 07:37:26 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 76.223.74.19 ↩ a17e3af40ff1fea6a.awsglobalaccelerator.com
  • 15.197.197.210 ↩ a17e3af40ff1fea6a.awsglobalaccelerator.com

Mail Server IPs

  • 170.10.152.242 ↩ usb-smtp-delivery-2.mimecast.com
  • 170.10.150.242 ↩ usb-smtp-delivery-2.mimecast.com

SOA Record

Raw SOA ns-1264.awsdns-30.org awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1264.awsdns-30.org
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-1264.awsdns-30.org
ns-1883.awsdns-43.co.uk
ns-492.awsdns-61.com
ns-712.awsdns-25.net

SPF Record

✓ Soft Fail (~all)
v=spf1 include:spf.crain.com include:usb._netblocks.mimecast.com ~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

6 records
  • knowbe4-site-verification=33b50c02d52ad8dd4b8b221a908a77d2
  • sending_domain201082=a26c3925e1b713cc4a82cb3b61ff84360dd0ab547f840d068c6245fc159ffc07
  • SPFv=spf1 include:spf.crain.com include:usb._netblocks.mimecast.com ~all
  • MS=ms18710445
  • facebook-domain-verification=o1vwbrswpsuh3oiic5rtcx4aqlpcrf
  • google-site-verification=VVAXcqs1RZHr7yNaA0BNQcpIYETN4svziqlGOongqrU
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