comstern.de

Valid Email Server
Domain Lookup › comstern.de

Domain Overview

DNS: ✓ 1mo ago Checker: ✓ 1mo ago
comstern.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-06 14:55:34 UTC · ↺ Refresh

MX Hostnames

  • comstern-de.mail.protection.outlook.com

MX Priorities

  • comstern-de.mail.protection.outlook.com: 0

A / AAAA Records

  • 172.67.215.143 (no PTR)
  • 104.21.16.191 (no PTR)
  • 2606:4700:3031::ac43:d78f
  • 2606:4700:3030::6815:10bf

Mail Server IPs

  • 52.101.185.14 ↩ mail-zr1p278cu00206.inbound.protection.outlook.com
  • 52.101.185.12 ↩ mail-zrap278cu00304.inbound.protection.outlook.com
  • 52.101.185.13 ↩ mail-zrzp278cu00205.inbound.protection.outlook.com
  • 52.101.187.1 ↩ mail-gvap278cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:ca3c::1 ↩ mail-zrzp278cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:ca3c:: ↩ mail-zrap278cu00300.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 anna.ns.cloudflare.com dns.cloudflare.com 2400856942 10000 2400 604800 1800
Primary NS (mname)
anna.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2400856942
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

ian.ns.cloudflare.com
anna.ns.cloudflare.com

SPF Record

✓ Soft Fail (~all)
v=spf1 a:mail.ostendis.ch include:spf.mtfweb.ch include:spf.protection.outlook.com ~all
📊 DNS lookups: 3/10
~ 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

4 records
  • MS=ms22735515
  • MS=ms29151913
  • nBMameZFe/lQOSV0nIj7ce7PrvqM0twbjia8mOSll1i4gqbq2dOUK94n6fU864gVNr9HIipVzOqm57hww7LH4g==
  • SPFv=spf1 a:mail.ostendis.ch include:spf.mtfweb.ch include:spf.protection.outlook.com ~all
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