Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
nanoscale.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 17:55:06 UTC · ↺ Refresh
MX Hostnames
- mx1.bs.ptb.de
- mx1.berlin.ptb.de
MX Priorities
- mx1.berlin.ptb.de: 30
- mx1.bs.ptb.de: 10
A / AAAA Records
- 192.53.103.121 ↩ u99121.bs.ptb.de
Mail Server IPs
- 194.94.94.97 ↩ MX1.Berlin.PTB.DE
- 2001:638:610:cdce::61 ↩ mx1.berlin.ptb.de
- 192.53.103.120 ↩ mx1.bs.ptb.de
- 2001:638:610:bd01::120 ↩ mx1.bs.ptb.de
SOA Record
Raw SOA
ns1.ptb.de postmaster.ptb.de 2025011714 14400 3600 604800 86400
Primary NS (mname)
ns1.ptb.de
Admin Email (rname)
postmaster@ptb.de
Serial
2025011714
Refresh
14400s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns1.ptb.de
dns-2.dfn.de
dns-3.dfn.de
dns-1.dfn.de
SPF Record
✗ Invalid
v=spf1 -all
📊 DNS lookups: 0/10
⚠ Strict -all with no allowed senders — no servers can send email for this domain.
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: reject
DKIM Selectors
✓ 13 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
mail._domainkey
dkim._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
zoho._domainkey
sendgrid._domainkey
mxvault._domainkey
amazonses._domainkey
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 -all
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