Domain Overview
DNS: ✓ 1mo ago
Checker: ✓ 1mo ago
xtrasystem.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-06 13:47:49 UTC · ↺ Refresh
MX Hostnames
- mail.xtrasystem.com
MX Priorities
- mail.xtrasystem.com: 10
A / AAAA Records
- 178.77.78.18 ↩ srv6.xtst.de
- 2a01:488:66:1000:b24d:4e12::1 ↩ srv6.xtst.de
Mail Server IPs
- 46.163.75.233 ↩ mail.xtrasystem.com
- 2a01:488:66:1000:2ea3:4be9::1 ↩ mail.xtrasystem.com
SOA Record
Raw SOA
a.xnameserver.de hostmaster.inwx.de 2021062500 10800 3600 604800 3600
Primary NS (mname)
a.xnameserver.de
Admin Email (rname)
hostmaster@inwx.de
Serial
2021062500
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
b.xnameserver.de
c.xnameserver.de
a.xnameserver.de
SPF Record
✓ Strict (-all)
v=spf1 +a +mx +a:mail.xtrasystem.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;pct=100;rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 216 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 +a +mx +a:mail.xtrasystem.com -all
Full email verification for xtrasystem.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits