"osu!" matching MCP servers:

Enables AI coding clients to inspect and invoke local-only tools for an evidence-gated outbound workflow, including buyer selection, mailbox verification, deduplication, factual preflight, and approval-hash checks, with sending disabled by default. It supports synthetic demos and dry-run transports without mailbox credentials, while requiring explicit authorization before any live email action.

Enables assessing and comparing domains for email spoofing risk by evaluating SPF, DMARC, MX, and DKIM records from public DNS, providing A-F grades and concrete remediation steps.