4
records
IPv4 Addresses
TTL
support.ibiblio.org. 900 IN A 152.19.134.20
IPv6 Addresses
TTL
support.ibiblio.org. 900 IN AAAA 2600:2701:4000:5210:0:BAD:CAFE:1A
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
10m
DMARC
Percentage
pct: share of mail that gets quarantine/reject; 100 = all failing messages (default).
10
DMARC
RUA
mailto:[email protected]
Aggregate DMARC reports (ZIP/XML). Optional but recommended for visibility.
DMARC
RUF
mailto:[email protected]
Forensic (per-failure) reports. Often omitted for privacy or volume.
support.ibiblio.org. 600 IN DMARC v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; pct=10
SPF (Sender Policy Framework)
TTL
SPF
SPFv1
| Qualifier | Mechanism | Target / value | Valid | Details |
|---|---|---|---|---|
| + Pass | a |
—
|
|
|
| + Pass | ip4 |
|
||
| + Pass | ip6 |
|
||
| + Pass | mx |
|
||
| + Pass | mx |
|
||
| + Pass | all |
—
|
|
20m
support.ibiblio.org. 1200 IN TXT "v=spf1 a ip4:152.19.134.20 ip6:2600:2701:4000:5210:0:bad:cafe:1a mx:relay.unc.edu mx:unc.edu +all"