Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
bis-school.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 21:47:29 UTC · ↺ Refresh
MX Hostnames
- ASPMX.L.GOOGLE.com
- ALT2.ASPMX.L.GOOGLE.com
- ALT1.ASPMX.L.GOOGLE.com
MX Priorities
- alt2.aspmx.l.google.com: 5
- alt1.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
A / AAAA Records
- 104.17.71.73 (no PTR)
Mail Server IPs
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 142.251.167.26 ↩ ww-in-f26.1e100.net
- 2607:f8b0:4004:c21::1a ↩ pe-in-f26.1e100.net
SOA Record
Raw SOA
dns1.tnib.de hostmaster.tnib.de 2026030501 3600 900 604800 3600
Primary NS (mname)
dns1.tnib.de
Admin Email (rname)
hostmaster@tnib.de
Serial
2026030501
Refresh
3600s
Retry
900s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
dns1.tnib.de
dns3.tnib.de
dns2.tnib.de
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.bis-school.com include:amazonses.com include:_spf.google.com include:_tnib.bis-school.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;rua=mailto:[email protected];fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
google._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
9 records- google-site-verification=XswRDS_c9FQOy03X_mXyKx0yLGxeFejtAu297Ptwq4k
- apple-domain-verification=lmj4XxGmlBon5dzj
- google-site-verification=qujW9EsT-WC24qYkdL5q0vwxQ7ywG5UsIlZUFznHbvY
- amazonses:E8yiUFTTvUMuyoWQxbKM5ifrNgMAdjumFAML4mJ+O8Q=
- adobe-idp-site-verification=b291c30da7dd46114d6fca939ae8c248ea31d25a9a92220dad4c0743a0389cff
- SPFv=spf1 include:_spf.bis-school.com include:amazonses.com include:_spf.google.com include:_tnib.bis-school.com -all
- google-site-verification=FypuNfaPZhOdk7wd8i2XBqz4I0g07_AEJbV8Og_MmP8
- ZOOM_verify_uTmY3HVhkCaeXV1eZHFzLt
- MS=ms50766788
Full email verification for bis-school.com
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