Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cosmo-gmbh.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 12:41:34 UTC · ↺ Refresh
MX Hostnames
- cosmogmbh-de01c.mail.protection.outlook.com
MX Priorities
- cosmogmbh-de01c.mail.protection.outlook.com: 0
A / AAAA Records
- 199.60.103.122 (no PTR)
- 199.60.103.22 (no PTR)
Mail Server IPs
- 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 52.101.170.1 ↩ mail-fr4p281cu03101.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
dax.ns.cloudflare.com dns.cloudflare.com 2399212216 10000 2400 604800 1800
Primary NS (mname)
dax.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399212216
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
oaklyn.ns.cloudflare.com
dax.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 a mx a:mail.klier.de ip4:212.6.122.0/24 ip4:37.228.159.140 ip4:85.88.20.142 ip4:91.250.69.130 ip4:85.88.20.136 ip4:85.88.20.138 ip6:2a01:488:42:1000:5bfa:4582:: include:spf.brevo.com include:spf.protection.outlook.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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
3 records- SPFv=spf1 a mx a:mail.klier.de ip4:212.6.122.0/24 ip4:37.228.159.140 ip4:85.88.20.142 ip4:91.250.69.130 ip4:85.88.20.136 ip4:85.88.20.138 ip6:2a01:488:42:1000:5bfa:4582:: include:spf.brevo.com include:spf.protection.outlook.com -all
- MS=ms86021756
- google-site-verification=ggv8bOMO1qaBLVUwh0UVJ0MrtvT-62jM6ynvtFk6Stc
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 cosmo-gmbh.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits