instrumentsystems.com

Valid Email Server
Domain Lookup › instrumentsystems.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
instrumentsystems.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-17 22:35:54 UTC · ↺ Refresh

MX Hostnames

  • cluster-j.mailcontrol.com
  • cluster-b.mailcontrol.com

MX Priorities

  • cluster-b.mailcontrol.com: 10
  • cluster-j.mailcontrol.com: 150

A / AAAA Records

  • 157.90.70.216 ↩ hprod.instrumentsystems.com

Mail Server IPs

  • 85.115.56.190 ↩ cluster-b.mailcontrol.com
  • 85.115.54.190 ↩ cluster-j.mailcontrol.com

SOA Record

Raw SOA ns1.m-online.net hostmaster.m-net.de 2025071500 86400 7200 3600000 172800
Primary NS (mname)
ns1.m-online.net
Admin Email (rname)
hostmaster@m-net.de
Serial
2025071500
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
172800s

Nameservers (NS)

ns4.m-online.net
ns3.m-online.net
ns2.m-online.net
ns1.m-online.net

SPF Record

✓ Strict (-all)
v=spf1 a mx include:mailcontrol.com include:inxserver.com a:mx01.rexx-systems.de include:agenturserver.de include:spf.protection.outlook.com a:hprod.instrumentsystems.net a:exch.instrumentsystems.de -all
📊 DNS lookups: 9/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; sp=reject; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject

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
  • D2971163
  • cisco-ci-domain-verification=5c9fac879a8ff962966a3c1de04e756a66d9cd83f58e94d8cfb47e42f2fe7371
  • MS=ms57353634
  • SPFv=spf1 a mx include:mailcontrol.com include:inxserver.com a:mx01.rexx-systems.de include:agenturserver.de include:spf.protection.outlook.com a:hprod.instrumentsystems.net a:exch.instrumentsystems.de -all
  • MS=562A5DACDB824E19F80C653B545ADBACEE834F48
  • atlassian-domain-verification=khlcvkh52YHFe24eCJi20IgUxgaQYaohHdTwza2N0Rv76y7n4EbFsddBaaD5rCes
  • google-site-verification=F3ocAaVxDDdaUr8MIqLhMjhNjVGDVv-LhMVV8ITDiic
  • apple-domain-verification=7avgazeXlIg4JF5T
Full email verification for instrumentsystems.com

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