Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
coresis.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 19:07:55 UTC · ↺ Refresh
MX Hostnames
- coresis-de.gate.seppmail.cloud
MX Priorities
- coresis-de.gate.seppmail.cloud: 0
A / AAAA Records
- 217.160.0.76 ↩ 217-160-0-76.elastic-ssl.ui-r.com
- 2001:8d8:100f:f000::239 ↩ 2001-08d8-100f-f000-0000-0000-0000-0239.elastic-ssl.ui-r.com
Mail Server IPs
- 49.12.23.112 ↩ gate.de.seppmail.cloud
- 167.233.8.136 ↩ gate.de.seppmail.cloud
- 2a01:4f8:1c1d:6b8::1 ↩ gate.de.seppmail.cloud
- 2a01:4f8:c011:544::1 ↩ gate.de.seppmail.cloud
SOA Record
Raw SOA
ns1064.ui-dns.biz hostmaster.1und1.de 2015092383 28800 7200 604800 300
Primary NS (mname)
ns1064.ui-dns.biz
Admin Email (rname)
hostmaster@1und1.de
Serial
2015092383
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns1064.ui-dns.org
ns1064.ui-dns.com
ns1064.ui-dns.de
ns1064.ui-dns.biz
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:_spf.de.seppmail.cloud -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
✓ 3 found
selector1._domainkey
selector2._domainkey
default._domainkey
✓ Public key: 392 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
3 records- MS=ms84960714
- 0ed1fe018a86e1da24426c4f9c915c36720c63c240
- SPFv=spf1 include:spf.protection.outlook.com include:_spf.de.seppmail.cloud -all
Full email verification for coresis.de
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