Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
madsack.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 15:20:35 UTC · ↺ Refresh
MX Hostnames
- madsack-de.mail.protection.outlook.com
MX Priorities
- madsack-de.mail.protection.outlook.com: 10
A / AAAA Records
- 85.13.153.162 ↩ dd36918.kasserver.com
Mail Server IPs
- 52.101.68.36 ↩ mail-db5pr02cu00104.inbound.protection.outlook.com
- 52.101.68.29 ↩ mail-dbapr03cu00105.inbound.protection.outlook.com
- 52.101.73.19 ↩ mail-as8pr04cu00803.inbound.protection.outlook.com
- 52.101.68.8 ↩ mail-du0pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca04::6 ↩ mail-db4pr02cu00406.inbound.protection.outlook.com
- 2a01:111:f403:ca04:: ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::20 ↩ mail-as8pr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
SOA Record
Raw SOA
ns0.niedersachsen.com dns.gutenberg-rz.de 2026040438 14400 3600 3600 120
Primary NS (mname)
ns0.niedersachsen.com
Admin Email (rname)
dns@gutenberg-rz.de
Serial
2026040438
Refresh
14400s
Retry
3600s
Expire
3600s
Minimum TTL
120s
Nameservers (NS)
ns0.niedersachsen.com
secondary004.dtag.net
pns.dtag.de
SPF Record
✓ Soft Fail (~all)
v=spf1 include:spf.protection.outlook.com include:spf.gutenberg-rz.de include:email.prnewswire.com include:spf.agnitas.de ip4:85.25.89.5 ip4:85.13.130.119 ip4:85.236.48.61 include:belege-madsack.foxybytes.de ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; sp=none; rua=mailto:[email protected]; fo=1; ri=604800;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
mail._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
13 records- asv=ceac721bd9ed77f720ad6cad7b72369c
- adobe-idp-site-verification=1b811a68-4e86-42af-97da-f4a40eba0728
- asv=8c125730cfc1b53306ec3d08ff6c22cd
- brevo-code:83cb93e1e911841c9e0767e88e194cc4
- brevo-code:308c86d4f28eab5c581ed03758c8574c
- brevo-code:3124cec412a6e08a6fdba3c6fe57b6f1
- asv_domain=91e03bc4b205de5da3c79367ec88e952
- axpkKR3q/62Y2IZHgU/thnQsAE5vhbF7BQa0xiy5CYB4HJCMqzy99GZFbVOyaV/MOyC2GRo8H0B7MK4Ux4t3cw==
- brevo-code:41ed23da4d4a67c75bc124f5e69954c5
- google-site-verification=DvwmIdVMUdEDNgA5IuxmaddTidh8jNNYj959B9MUvUY
- vfOmk7vsUxelKsxwAHMxSQPqOE+ZznnRp6upM5gl6Mu7D0RH8kccRJSl9Nc30fwDk+BWRksvb84yrIKX3+/hfA==
- MS=ms20278345
- SPFv=spf1 include:spf.protection.outlook.com include:spf.gutenberg-rz.de include:email.prnewswire.com include:spf.agnitas.de ip4:85.25.89.5 ip4:85.13.130.119 ip4:85.236.48.61 include:belege-madsack.foxybytes.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 madsack.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits