Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gsfedern.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-26 18:02:04 UTC · ↺ Refresh
MX Hostnames
- gsfedern-de.mail.protection.outlook.com
MX Priorities
- gsfedern-de.mail.protection.outlook.com: 10
A / AAAA Records
- 18.198.166.35 ↩ bamberg.jweiland.cloud
- 2a05:d014:14f:aa0c:35c3:4b6c:75cd:6ca0 ↩ bamberg.jweiland.cloud
Mail Server IPs
- 52.101.68.10 ↩ mail-dbbpr03cu00102.inbound.protection.outlook.com
- 52.101.68.29 ↩ mail-dbapr03cu00105.inbound.protection.outlook.com
- 52.101.68.16 ↩ mail-db4pr02cu00400.inbound.protection.outlook.com
- 52.101.68.8 ↩ mail-du0pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:ca04::9 ↩ mail-db7pr03cu00601.inbound.protection.outlook.com
- 2a01:111:f403:ca04::6 ↩ mail-db4pr02cu00406.inbound.protection.outlook.com
- 2a01:111:f403:ca09:: ↩ mail-am3pr04cu00500.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-900.awsdns-48.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-900.awsdns-48.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-900.awsdns-48.net
ns-1434.awsdns-51.org
ns-1576.awsdns-05.co.uk
ns-305.awsdns-38.com
SPF Record
✓ Strict (-all)
v=spf1 +a +mx +a:bamberg.jweiland.cloud ip4:91.207.212.0/24 include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; adkim=s; aspf=s
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
6 records- i93md69844bf41aa6b79ngmdr4
- kbvsddm9780i20f0ec9foattnj
- qb9mqd0c4v0mpp3ai85nvsolfs
- SPFv=spf1 +a +mx +a:bamberg.jweiland.cloud ip4:91.207.212.0/24 include:spf.protection.outlook.com -all
- MS=ms80636807
- bMI4h9ij1DFF1DldLy3K5DLvrhdnWDSbn+mvir7mJspnRV7LNaMsi4Jhg0usn60E6bhI1JOUZ4pBe4KzjWTHnA==
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 gsfedern.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits