Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
kollin.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-31 23:12:36 UTC · ↺ Refresh
MX Hostnames
- kollin-de.mail.protection.outlook.com
MX Priorities
- kollin-de.mail.protection.outlook.com: 10
A / AAAA Records
- 80.74.152.50 ↩ tesla.sui-inter.net
Mail Server IPs
- 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca2d::2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 2a01:111:f403:ca2d::1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 2a01:111:f403:ca27:: ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1111.ui-dns.com hostmaster.1und1.de 2015091770 28800 7200 604800 300
Primary NS (mname)
ns1111.ui-dns.com
Admin Email (rname)
hostmaster@1und1.de
Serial
2015091770
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns1111.ui-dns.org
ns1111.ui-dns.biz
ns1111.ui-dns.com
ns1111.ui-dns.de
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:83.141.5.203 include:sendgrid.net include:kundenserver.de include:_spf.sui-inter.net include:spf.protection.outlook.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- MS=ms91025234
- SPFv=spf1 a mx ip4:83.141.5.203 include:sendgrid.net include:kundenserver.de include:_spf.sui-inter.net include:spf.protection.outlook.com -all
Full email verification for kollin.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits