markusdowne/agentmail
Give AI agents their own email inboxes using the AgentMail API. Use when building email agents, sending/receiving emails programmatically, managing inboxes, handling attachments, organizing with labels, creating drafts for human approval, or setting up real-time notifications via webhooks/websockets. Supports multi-tenant isolation with pods.
95
93%
Does it follow best practices?
Impact
100%
1.07xAverage score across 4 eval scenarios
Advisory
Suggest reviewing before use
Security
1 medium severity finding. This skill can be installed but you should review these findings before use.
W011: Third-party content exposure detected (indirect prompt injection risk)
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
Third-party content exposure detected (high risk: 0.90). The SKILL.md and its references (references/webhooks.md and references/websockets.md) show the SDK ingesting inbound email bodies, attachments, webhook payloads, and websocket events (user-generated, untrusted content) and demonstrate agent code paths that read/process those messages and may trigger downstream actions (e.g., processEmail, auto-replies), so the agent is clearly exposed to untrusted third-party content that could enable indirect prompt injection.
- Audited
- Security analysis