Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
certlex.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-21 07:31:07 UTC · ↺ Refresh
MX Hostnames
- certlex-de.mail.protection.outlook.com
MX Priorities
- certlex-de.mail.protection.outlook.com: 0
A / AAAA Records
- 49.12.0.174 ↩ static.174.0.12.49.clients.your-server.de
Mail Server IPs
- 52.101.73.26 ↩ mail-as9pr05cu01302.inbound.protection.outlook.com
- 52.101.68.16 ↩ mail-db4pr02cu00400.inbound.protection.outlook.com
- 52.101.73.1 ↩ mail-am3pr04cu00501.inbound.protection.outlook.com
- 52.101.73.24 ↩ mail-as8pr05cu00300.inbound.protection.outlook.com
- 2a01:111:f403:ca04::e ↩ mail-db8pr02cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca09::1 ↩ mail-as9pr07cu00301.inbound.protection.outlook.com
- 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1067.ui-dns.de hostmaster.1and1.com 2018091175 28800 7200 604800 600
Primary NS (mname)
ns1067.ui-dns.de
Admin Email (rname)
hostmaster@1and1.com
Serial
2018091175
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns1067.ui-dns.de
ns1076.ui-dns.com
ns1047.ui-dns.org
ns1091.ui-dns.biz
SPF Record
✓ Strict (-all)
v=spf1 mx include:_spf-eu.ionos.com include:spf.mandrillapp.com include:servers.mcsv.net 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]; fo=1; ri=86400
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → 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- MS=ms36907523
- google-site-verification=PeYlQMbLc26CfdHM8AwXl4aTzuKiH2WyjxGeUKHrVdA
- SPFv=spf1 mx include:_spf-eu.ionos.com include:spf.mandrillapp.com include:servers.mcsv.net include:spf.protection.outlook.com -all
Full email verification for certlex.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits