5
records
IPv4 Addresses
TTL
v2002.coreserver.jp. 300 IN A 163.44.176.12
IPv6 Addresses
TTL
v2002.coreserver.jp. 300 IN AAAA 2400:8500:1301:162:0:0:12:1
Mail Servers
TTL
MX
—
10
10m
v2002.coreserver.jp. 600 IN MX 10 v2002.coreserver.jp.
DMARC
TTL
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).
v2002.coreserver.jp. 300 IN DMARC v=DMARC1; p=none;
SPF (Sender Policy Framework)
TTL
SPF
SPFv1
| Qualifier | Mechanism | Target / value | Valid | Details |
|---|---|---|---|---|
| + Pass | a |
|
||
| + Pass | a |
|
||
| + Pass | a |
|
||
| + Pass | ip6 |
|
||
| ~ Softfail | all |
—
|
|
20m
v2002.coreserver.jp. 1200 IN TXT "v=spf1 a:v2002.coreserver.jp a:spf4_mxr.valueserver.jp a:spf5_mxr.valueserver.jp ip6:2400:8500:1301:162::12:1 ~all"