Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sstroop.nl
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 07:27:49 UTC · ↺ Refresh
MX Hostnames
- mxprimary.spamfilterserver.com
- mxfallback.spamfilterserver.com
MX Priorities
- mxfallback.spamfilterserver.com: 20
- mxprimary.spamfilterserver.com: 10
A / AAAA Records
- 85.17.104.5 ↩ srv4.hostingindustries.nl
- 2001:1af8:2100:b0a0::5 ↩ srv4.hostingindustries.nl
Mail Server IPs
- 185.145.63.213 ↩ fallback.spamfilterserver.com
- 2a02:cc9::63:0:0:0:213 ↩ fallback.spamfilterserver.com
- 87.236.99.28 ↩ primary.spamfilterserver.com
- 87.236.99.29 ↩ primary.spamfilterserver.com
- 2a02:cc8::99:29 ↩ primary.spamfilterserver.com
- 2a02:cc8::99:28 ↩ primary.spamfilterserver.com
SOA Record
Raw SOA
nssec1.hostingindustries.nl hostmaster.hostingindustries.nl 2026030300 28800 7200 604800 86400
Primary NS (mname)
nssec1.hostingindustries.nl
Admin Email (rname)
hostmaster@hostingindustries.nl
Serial
2026030300
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
nssec3.hostingindustries.de
nssec1.hostingindustries.nl
nssec2.hostingindustries.nl
SPF Record
✓ Strict (-all)
v=spf1 include:srv4.hostingindustries.nl include:mailcluster.hostingindustries.nl include:_spf.createsend.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=none; fo=1; ri=86400; adkim=s; aspf=s; rua=mailto:[email protected]; ruf=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 392 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
1 record- SPFv=spf1 include:srv4.hostingindustries.nl include:mailcluster.hostingindustries.nl include:_spf.createsend.com -all
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