serrahn.com

Valid Email Server
Domain Lookup › serrahn.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
serrahn.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-28 21:35:43 UTC · ↺ Refresh

MX Hostnames

  • serrahn-com.mail.protection.outlook.com

MX Priorities

  • serrahn-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 37.9.175.211 (no PTR)
  • 2a00:4b40:aaaa:2011::5 (no PTR)

Mail Server IPs

  • 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
  • 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 2a01:111:f403:ca27:: ↩ mail-beup281cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.websupport.cz admin.websupport.cz 1757601688 7200 2048 1048576 2560
Primary NS (mname)
ns1.websupport.cz
Admin Email (rname)
admin@websupport.cz
Serial
1757601688
Refresh
7200s
Retry
2048s
Expire
1048576s
Minimum TTL
2560s

Nameservers (NS)

ns3.websupport.eu
ns1.websupport.cz
ns2.websupport.cz

SPF Record

✓ Strict (-all)
v=spf1 ip4:80.151.176.221 ip4:178.24.232.103 include:spf.protection.outlook.com include:_spf.m1.websupport.sk -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict 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

2 records
  • SPFv=spf1 ip4:80.151.176.221 ip4:178.24.232.103 include:spf.protection.outlook.com include:_spf.m1.websupport.sk -all
  • MS=ms15620501
Full email verification for serrahn.com

Run SMTP check, SPF/DKIM/DMARC and catch-all detection.

SPF / DKIM / DMARC Get 1,000 Free Credits