Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
srvn.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-21 19:49:02 UTC · ↺ Refresh
MX Hostnames
- mx02.sack.dev
- mx01.sack.dev
MX Priorities
- mx02.sack.dev: 10
- mx01.sack.dev: 10
A / AAAA Records
- 5.9.111.169 ↩ mx01.sack.dev
- 188.40.128.78 ↩ static.78.128.40.188.clients.your-server.de
- 2a01:4f8:162:1d06::cafe (no PTR)
Mail Server IPs
- 195.110.20.3 ↩ mx02.sack.dev
- 2001:67c:864:1::babe ↩ mx02.sack.dev
- 5.9.111.169 ↩ mx01.sack.dev
- 2a01:4f8:162:1d06::babe ↩ mx01.sack.dev
SOA Record
Raw SOA
ns1.sack.dev hostmaster.sack.dev 2026031801 1200 180 1209600 60
Primary NS (mname)
ns1.sack.dev
Admin Email (rname)
hostmaster@sack.dev
Serial
2026031801
Refresh
1200s
Retry
180s
Expire
1209600s
Minimum TTL
60s
Nameservers (NS)
ns4.sack.dev
ns2.sack.dev
ns1.sack.dev
ns3.sack.dev
SPF Record
✓ Strict (-all)
v=spf1 include:sack.dev -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; adkim=r; aspf=r; rf=afrf; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- SPFv=spf1 include:sack.dev -all
- MS=ms17835551
- google-site-verification=zPLt-XiLErXqflDhpPiVph_RFIlc7mbjRK0OfFTJO8I
- MqkLh/5WAVEoLQZPXGPTb0FxzJRd+lokSHjjbXw+ICHCAlnTba/t9tbxEtDb+Hj+XV7Ds07ikrm4lYH4aRNJMw==
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