Domain Overview
DNS: ✓ 5h ago
Checker: ✓ 5h ago
api.ch
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-05-21 20:28:58 UTC · ↺ Refresh
MX Hostnames
- d302473.a.ess.de.barracudanetworks.com
- d302473.b.ess.de.barracudanetworks.com
MX Priorities
- d302473.a.ess.de.barracudanetworks.com: 10
- d302473.b.ess.de.barracudanetworks.com: 10
A / AAAA Records
- 83.166.139.193 ↩ api.ch
Mail Server IPs
- 18.185.115.251 ↩ mail.ess.de.barracuda.com
- 18.185.115.250 ↩ mail.ess.de.barracuda.com
- 18.185.115.252 ↩ mail.ess.de.barracuda.com
SOA Record
Raw SOA
dns1.swizzonic.ch hostmaster.swizzonic.ch 2026052001 10800 3600 604800 86400
Primary NS (mname)
dns1.swizzonic.ch
Admin Email (rname)
hostmaster@swizzonic.ch
Serial
2026052001
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
dns2.swizzonic.ch
dns1.swizzonic.ch
SPF Record
✓ Strict (-all)
v=spf1 ip4:35.157.190.224/27 ip4:18.185.115.192/26 ip4:18.184.203.224/27 ip4:62.2.166.103/32 ip4:62.2.166.105/32 ip4:62.2.160.196/26 ip4:62.2.166.20/32 include:spf.ess.de.barracudanetworks.com include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:35.157.190.224/27 ip4:18.185.115.192/26 ip4:18.184.203.224/27 ip4:62.2.166.103/32 ip4:62.2.166.105/32 ip4:62.2.160.196/26 ip4:62.2.166.20/32 include:spf.ess.de.barracudanetworks.com include:spf.protection.outlook.com -all
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