rudolf-sievers.de

Valid Email Server
Domain Lookup › rudolf-sievers.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
rudolf-sievers.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-26 20:39:03 UTC · ↺ Refresh

MX Hostnames

  • rudolfsievers-de01e.mail.protection.outlook.com

MX Priorities

  • rudolfsievers-de01e.mail.protection.outlook.com: 0

A / AAAA Records

  • 31.220.122.246 ↩ r28091.agenturserver.it

Mail Server IPs

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

SOA Record

Raw SOA ns1.register-it.net hostmaster.creanet.de 2020111300 14400 1800 604800 300
Primary NS (mname)
ns1.register-it.net
Admin Email (rname)
hostmaster@creanet.de
Serial
2020111300
Refresh
14400s
Retry
1800s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns2.register-it.net
ns1.register-it.net

SPF Record

✓ Strict (-all)
v=spf1 mx ip4:62.217.43.194 ip4:78.47.62.13 ip4:62.93.3.204 ip4:194.25.204.60 ip4:213.232.64.0/24 ip4:31.220.122.246 ip4:37.202.1.0/24 include:spf.nl2go.com include:agenturserver.de include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ 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
  • google-site-verification=fwE9sFRi3MVtk2d8gMHiZDWHVJKemZj0VI5eqNNwFaM
  • SPFv=spf1 mx ip4:62.217.43.194 ip4:78.47.62.13 ip4:62.93.3.204 ip4:194.25.204.60 ip4:213.232.64.0/24 ip4:31.220.122.246 ip4:37.202.1.0/24 include:spf.nl2go.com include:agenturserver.de include:spf.protection.outlook.com -all
  • knowbe4-site-verification=f01bb749ce3c8427e34aa9ff1e1342e6
  • brevo-code:f77b6d8b878364e7d357beb7a5c7fb95
Free · No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for rudolf-sievers.de

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits