sterk.ch

Valid Email Server
Domain Lookup › sterk.ch
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
sterk.ch
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-10-29 14:17:42 UTC · ↺ Refresh

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MX Hostnames

  • sterk-ch.mail.protection.outlook.com

MX Priorities

  • sterk-ch.mail.protection.outlook.com: 0

A / AAAA Records

  • 3.5.136.85 ↩ s3.eu-central-1.amazonaws.com
  • 52.219.209.20 ↩ s3-website.eu-central-1.amazonaws.com
  • 3.5.121.218
  • 3.5.134.25
  • 3.5.134.58
  • 3.5.136.231
  • 3.5.138.167
  • 52.219.171.88

Mail Server IPs

  • 52.101.185.14 ↩ mail-zr1p278cu00206.inbound.protection.outlook.com
  • 52.101.187.1 ↩ mail-gvap278cu00301.inbound.protection.outlook.com
  • 52.101.185.13 ↩ mail-zrzp278cu00205.inbound.protection.outlook.com
  • 52.101.185.12 ↩ mail-zrap278cu00304.inbound.protection.outlook.com
  • 2a01:111:f403:ca3c:: ↩ mail-zrap278cu00300.inbound.protection.outlook.com
  • 2a01:111:f403:ca3c::1 ↩ mail-zrzp278cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:ca3e::1 ↩ mail-gvap278cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:ca3c::2 ↩ mail-zr1p278cu00202.inbound.protection.outlook.com

SOA Record

Raw SOA ns-1114.awsdns-11.org awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1114.awsdns-11.org
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-1776.awsdns-30.co.uk
ns-441.awsdns-55.com
ns-878.awsdns-45.net
ns-1114.awsdns-11.org

SPF Record

✓ Strict (-all)
v=spf1 a mx include:spf.mtasv.net ip4:217.26.52.22/23 ip4:93.189.64.0/22 ip4:81.92.109.4/26 ip4:217.11.38.186/32 include:spf.protection.outlook.com include:mx.virtualtec.ch include:mx100.virtualtec.ch include:mx200.virtualtec.ch -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
⚠ p=none — monitoring only, no enforcement
📋 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

4 records
  • SPFv=spf1 a mx include:spf.mtasv.net ip4:217.26.52.22/23 ip4:93.189.64.0/22 ip4:81.92.109.4/26 ip4:217.11.38.186/32 include:spf.protection.outlook.com include:mx.virtualtec.ch include:mx100.virtualtec.ch include:mx200.virtualtec.ch -all
  • varsv9ba6304hs6kn4l25d58j2
  • MS=ms97106596
  • google-site-verification=5QDLf2DKJWj7NL0X_5Xrn4CimnTxsX49T05wuc_0Uhk
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