Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
stu3dio.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 10:26:31 UTC · ↺ Refresh
MX Hostnames
- mail.stu3dio.com
MX Priorities
- mail.stu3dio.com: 10
A / AAAA Records
- 216.222.196.82 ↩ sh-cp3.lax2.servername.online
Mail Server IPs
- 216.222.196.82 ↩ sh-cp3.lax2.servername.online
SOA Record
Raw SOA
ns1.hostpapa.com admin.hostpapa.ca 2026032303 3600 3600 1209600 10800
Primary NS (mname)
ns1.hostpapa.com
Admin Email (rname)
admin@hostpapa.ca
Serial
2026032303
Refresh
3600s
Retry
3600s
Expire
1209600s
Minimum TTL
10800s
Nameservers (NS)
ns1.hostpapa.com
ns2.hostpapa.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:216.222.196.82 +a +mx +ip4:204.44.192.19 +include:spf.antispamcloud.com +include:spf.servername.online -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=quarantine; adkim=s; aspf=s; rf=afrf; ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: quarantine
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
1 record- SPFv=spf1 ip4:216.222.196.82 +a +mx +ip4:204.44.192.19 +include:spf.antispamcloud.com +include:spf.servername.online -all
Full email verification for stu3dio.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits