Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
isdedu.de
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 09:10:10 UTC · ↺ Refresh
MX Hostnames
- ALT4.ASPMX.L.GOOGLE.COM
- ASPMX.L.GOOGLE.COM
- ALT2.ASPMX.L.GOOGLE.COM
- ALT3.ASPMX.L.GOOGLE.COM
- ALT1.ASPMX.L.GOOGLE.COM
MX Priorities
- alt4.aspmx.l.google.com: 10
- alt3.aspmx.l.google.com: 10
- alt2.aspmx.l.google.com: 5
- alt1.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
A / AAAA Records
- 51.116.154.224
Mail Server IPs
- 173.194.76.27 ↩ ws-in-f27.1e100.net
- 2a00:1450:400c:c00::1b ↩ ws-in-f27.1e100.net
- 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
- 2a00:1450:4009:c0f::1b ↩ yulhrs-in-f27.1e100.net
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 142.251.167.27 ↩ ww-in-f27.1e100.net
- 2607:f8b0:4004:c09::1b ↩ bh-in-f27.1e100.net
SOA Record
Raw SOA
ns1.ntdns.de hostmaster.fastit.net 2025063054 10800 3600 604800 3600
Primary NS (mname)
ns1.ntdns.de
Admin Email (rname)
hostmaster@fastit.net
Serial
2025063054
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns1.ntdns.de
ns3.ntdns.de
ns2.ntdns.de
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx ip4:87.118.118.79 ip4:87.118.119.79 ip4:195.52.88.145 include:_spf.google.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ 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
11 records- _globalsign-domain-verification=YKc8pDGRK2VKSDScpTNZM8xJiObtGsR1hoMlYHgxkF
- cRe9vA38ayGMmuybE9f6PFL3U28J1fyREiQnF6Xp+pA=
- _globalsign-domain-verification=FNOdVzVKwPIIhApDtrvK0hWsb579AzI5RqU1iCkmnW
- /4SNKu+z3RaG/7dYR+UI65JAl0slsq6cFQwAvDKEVOY=
- MS=ms62947745
- google-site-verification=OQefTD98B5K6Hc0eUChlW7M_b1sfoA6ANCNpQ8Fsx44
- _globalsign-domain-verification=t93DuNmFdmYWVnrQ9iCFJK9prtCBHPuYpdn28Y4Wcd
- adobe-idp-site-verification=d8f3b7279c6e5bf3a4c7a12601c9bf0c8e3bb604b2c77fc4fcebf0ccf4df2614
- apple-domain-verification=niLPzoR4zUZ7jbYL
- adobe-idp-site-verification=0ba4bf9d5775516e72758e18ddc2006f0f084e97087a0902b220ac233d0e9911
- SPFv=spf1 a mx ip4:87.118.118.79 ip4:87.118.119.79 ip4:195.52.88.145 include:_spf.google.com ~all
Full email verification for isdedu.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits