Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tk-schulsoftware.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 08:15:40 UTC · ↺ Refresh
MX Hostnames
- mxext2.mailbox.org
- mxext3.mailbox.org
- mxext1.mailbox.org
MX Priorities
- mxext2.mailbox.org: 20
- mxext3.mailbox.org: 30
- mxext1.mailbox.org: 10
A / AAAA Records
- 23.88.42.12 ↩ static.12.42.88.23.clients.your-server.de
- 2a01:4f8:c013:165f::1 (no PTR)
Mail Server IPs
- 80.241.60.215 ↩ mx2.mailbox.org
- 2001:67c:2050:104::2:25:1 ↩ mx2.mailbox.org
- 80.241.60.216 ↩ mx3.mailbox.org
- 2001:67c:2050:104::3:25:1 ↩ mx3.mailbox.org
- 80.241.60.212 ↩ mx1.mailbox.org
- 2001:67c:2050:104::1:25:1 ↩ mx1.mailbox.org
SOA Record
Raw SOA
ns81.domaincontrol.com dns.jomax.net 2025112101 28800 7200 604800 600
Primary NS (mname)
ns81.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2025112101
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns82.domaincontrol.com
ns81.domaincontrol.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:mailbox.org include:spf.brevo.com mx ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; fo=1; adkim=s; aspf=s; pct=100
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected],mailto:[email protected]
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
6 records- facebook-domain-verification=zpwxs1p2k2oxxr5yyovduyi7dbz8jq
- google-site-verification=GPM7-83RFTasar3ZdntJZuvi5CFsNfEIngYfS-EkYNg
- SPFv=spf1 include:mailbox.org include:spf.brevo.com mx ~all
- Sendinblue-code:6eb1a9c21b3c9b7acd77fed14743cd79
- MS=ms41686512
- apple-domain-verification=C1IhsW6wltb3NxKL
Full email verification for tk-schulsoftware.de
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