IPv4 Addresses

TTL

Name Servers

TTL
5m
5m

Mail Servers

TTL

SOA Details

TTL
SOA Primary NS
20m
SOA Responsible
hostmaster.btf.ng
SOA Serial
2026030516
SOA Times
Refresh 3h
Retry 1h
Expire 7d
Minimum TTL 1h

Certificate Authority Authorization

TTL

DMARC

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DMARC Policy

Organizational policy (p): how receivers treat mail that fails aligned DMARC checks — none (monitor only), quarantine (often junk), or reject (block).

none quarantine reject
5m
DMARC Percentage

pct: share of mail that gets quarantine/reject; 100 = all failing messages (default).

100
DMARC RUA

Aggregate DMARC reports (ZIP/XML). Optional but recommended for visibility.

No aggregate report URIs (RUA).
DMARC RUF

Forensic (per-failure) reports. Often omitted for privacy or volume.

No forensic report URIs (RUF).

DKIM

TTL
DKIM Selector protonmail
v=DKIM1 k=rsa
20m
Public Key
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy+D1F6Usr//A...

SPF (Sender Policy Framework)

TTL
SPF SPFv1
Qualifier Mechanism Target / value Valid Details
+ Pass include
~ Softfail all
5m

MTA-STS

TTL

This hostname does not publish an MTA-STS policy (no v=STSv1 TXT at _mta-sts.<name> and/or no policy at https://mta-sts.<name>/.well-known/mta-sts.txt).

Text Content

TTL
protonmail-verification=3e665b4cfd193e8bb2d3d4ff17c7b0e6877272c4
5m
TXT
hosting-site=btf-website-f866e
5m