steeldynamics.com

Valid Email Server
Domain Lookup › steeldynamics.com

Domain Overview

DNS: ✓ 1mo ago Checker: ✓ 1mo ago
steeldynamics.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-07 15:54:12 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 70.34.160.233 ↩ www.steeldynamics.com

Mail Server IPs

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

SOA Record

Raw SOA ns0.ussignalcom.net postmaster.ussignalcom.net 2012051412 10800 3600 2419200 900
Primary NS (mname)
ns0.ussignalcom.net
Admin Email (rname)
postmaster@ussignalcom.net
Serial
2012051412
Refresh
10800s
Retry
3600s
Expire
2419200s
Minimum TTL
900s

Nameservers (NS)

ns3.ussignalcom.net
ns1.ussignalcom.net
ns4.ussignalcom.net
ns2.ussignalcom.net

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:64.141.148.170 ip4:50.104.125.24 ip4:64.141.148.98 include:spf.mtasv.net include:spf.protection.redatatech.com include:us._netblocks.mimecast.com include:_spf.salesforce.com include:sendgrid.net include:cust-spf.exacttarget.com ~all
📊 DNS lookups: 6/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1;p=quarantine;rua=mailto:[email protected];ruf=mailto:[email protected];fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 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

10 records
  • cisco-ci-domain-verification=2f47ab38e946620d60f2330d1c15833854b469d830a110348c1769ff615e6347
  • SFMC-asi_bd7SvGj-aP_O6uw-6tdVqYRVUAsPyT-_ynr1
  • SPFv=spf1 ip4:64.141.148.170 ip4:50.104.125.24 ip4:64.141.148.98 include:spf.mtasv.net include:spf.protection.redatatech.com include:us._netblocks.mimecast.com include:_spf.salesforce.com include:sendgrid.net include:cust-spf.exacttarget.com ~all
  • guR6LQMNnZDTHI7ImBTKK/2yD2VjVQFzGS25DG4BV8CefIL/UoZ9CbRIa2yUgadll80pn1tvEd5VO3CNF8k1ug==
  • knowbe4-site-verification=2684a848eddee95e7a7336c13e1d3257
  • ZOOM_verify_L2SVdKpBQVWTZZ-MLD1NkQ
  • rTH4VU064hkzq0hF006UQB1WCPo7a7raUKFPdPw4GX4wKm+IawLiYt0tO27siL6DyvGX8BoCI6YRAnd3Uxn+ZA==
  • MS=ms37146497
  • atlassian-domain-verification=rIH8aRbK33svbtGeawzkLw0A0XjaolOkzoYrgDGwGkI17udlfQwk/MJehR85Cvgv
  • abuseipdb-verification=2cBlD7ip
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