Each rewritten description now states both what the skill does (concrete
capability, named tools/artifacts) and an explicit when-to-use trigger,
improving agent discovery/activation. Grounded in each skill's own body;
changes confined to the `description` field only (bodies and all other
frontmatter untouched). Produced by a gated audit->rewrite->recheck loop
(548 -> 0 flagged) with a sampled anti-invention check (0 ungrounded).
Schema: 817/817 pass. Framework-ID gate: 0 defects.
Execute a phased DMARC rollout by inventorying sending sources, configuring SPF/DKIM alignment, and progressing DNS policy from p=none monitoring through p=quarantine to p=reject enforcement, ensuring all legitimate email sources authenticate before unauthorized senders are blocked. Use when deploying or advancing an organization's DMARC anti-spoofing posture, or when meeting bulk-sender authentication requirements from Google and Yahoo.
cybersecurity
phishing-defense
dmarc
spf
dkim
email-authentication
anti-spoofing
phishing
dns
email-security
1.0
mahipal
Apache-2.0
PR.AT-01
DE.CM-09
RS.CO-02
DE.AE-02
T1566
T1598
T1534
T1036
Performing DMARC Policy Enforcement Rollout
Overview
Domain-based Message Authentication, Reporting and Conformance (DMARC) is the cornerstone of email anti-spoofing protection. A DMARC rollout progresses through three phases: monitoring (p=none), quarantine (p=quarantine), and full enforcement (p=reject). When configured at p=reject, any email that fails both SPF and DKIM checks is outright rejected. Google and Yahoo now require DMARC for bulk senders (5,000+ emails), driving a 65% reduction in unauthenticated messages. The rollout typically takes 3-6 months for safe deployment.
When to Use
When conducting security assessments that involve performing dmarc policy enforcement rollout
When following incident response procedures for related security events
When performing scheduled security testing or auditing activities
When validating security controls through hands-on testing
Prerequisites
Administrative access to DNS management for the domain
Understanding of SPF, DKIM, and DMARC protocols (RFC 7208, 6376, 7489)
Complete inventory of all legitimate email sending sources
DMARC reporting analysis tool (EasyDMARC, DMARCLY, Valimail, or dmarcian)
Mahipal
2fb6a9faff