Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
drkfrankfurt.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 15:54:00 UTC · ↺ Refresh
MX Hostnames
- drkfrankfurt-de.mail.protection.outlook.com
MX Priorities
- drkfrankfurt-de.mail.protection.outlook.com: 10
A / AAAA Records
- 80.82.221.200 ↩ cms04.dml.dt-internet.de
Mail Server IPs
- 52.101.68.16 ↩ mail-db4pr02cu00400.inbound.protection.outlook.com
- 52.101.73.26 ↩ mail-as9pr05cu01302.inbound.protection.outlook.com
- 52.101.68.8 ↩ mail-du0pr03cu00100.inbound.protection.outlook.com
- 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::5 ↩ mail-am1pr04cu00105.inbound.protection.outlook.com
- 2a01:111:f403:ca09::1 ↩ mail-as9pr07cu00301.inbound.protection.outlook.com
- 2a01:111:f403:ca09::b ↩ mail-am7pr05cu00103.inbound.protection.outlook.com
- 2a01:111:f403:ca04::b ↩ mail-dbbpr03cu00103.inbound.protection.outlook.com
SOA Record
Raw SOA
shades17.rzone.de hostmaster.strato-rz.de 2020092014 86400 7200 604800 300
Primary NS (mname)
shades17.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020092014
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
shades17.rzone.de
docks15.rzone.de
SPF Record
✓ Soft Fail (~all)
v=spf1 mx a:_spf.internet1.de ip4:188.64.58.2 ip4:188.64.58.23 ip4:188.64.58.24 ip4:188.64.58.232 ip4:79.234.80.1 ip4:84.56.125.99 ip4:84.61.123.103 ip4:178.13.98.217 ip4:62.158.230.35 ip4:80.152.182.54 ip4:212.172.7.104 ip4:62.96.181.122 ip4:176.95.158.169 ip4:80.152.254.228 ip4:213.23.124.162 include:spf.protection.outlook.com include:users.hiorg-server.de include:_spf.internet1.de ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✗ None detectedNo 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- MS=ms51166425
- SPFv=spf1 mx a:_spf.internet1.de ip4:188.64.58.2 ip4:188.64.58.23 ip4:188.64.58.24 ip4:188.64.58.232 ip4:79.234.80.1 ip4:84.56.125.99 ip4:84.61.123.103 ip4:178.13.98.217 ip4:62.158.230.35 ip4:80.152.182.54 ip4:212.172.7.104 ip4:62.96.181.122 ip4:176.95.158.169 ip4:80.152.254.228 ip4:213.23.124.162 include:spf.protection.outlook.com include:users.hiorg-server.de include:_spf.internet1.de ~all
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 drkfrankfurt.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits