Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
quarterm.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 23:21:36 UTC · ↺ Refresh
MX Hostnames
- mail0.quarterm-tech.de
- mail.quarterm.de
MX Priorities
- mail.quarterm.de: 20
- mail0.quarterm-tech.de: 10
A / AAAA Records
- 217.160.0.156 ↩ 217-160-0-156.elastic-ssl.ui-r.com
Mail Server IPs
- 176.9.1.157 ↩ mail.quarterm-tech.de
- 176.9.1.173 ↩ mail0.quarterm-tech.de
SOA Record
Raw SOA
hydrogen.ns.hetzner.com dns.hetzner.com 2026030500 86400 10800 3600000 3600
Primary NS (mname)
hydrogen.ns.hetzner.com
Admin Email (rname)
dns@hetzner.com
Serial
2026030500
Refresh
86400s
Retry
10800s
Expire
3600000s
Minimum TTL
3600s
Nameservers (NS)
hydrogen.ns.hetzner.com
helium.ns.hetzner.de
oxygen.ns.hetzner.com
SPF Record
✓ Strict (-all)
v=spf1 +mx include:spf.sendinblue.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
7 records- SPFv=spf1 +mx include:spf.sendinblue.com -all
- brevo-code:2b39b76b03cea1e2cea2b8eb7b6f2f23
- brevo-code:75896ac27c644a8d3f5301eecad5b6a4
- brevo-code:ab248f801fe02c1980d00b433181809a
- brevo-code:b1107b47a2dd0ca0d90b67c4670df5d5
- google-site-verification=PEZTBoc9BJCMKUzxPwZGaRYMR7l4cFub9XMzODEKJoQ
- zone-ownership-verification-da1d33b5962ac29045e162cf18453d92d8bf48b31c0e96f1a6ad93d3ccdd7c65
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