Show HN: Secure agentic email infrastructure with beta desktop client (github.com)

A new AI tool called GigaMail has been announced, which integrates with existing AI agents like Claude and Codex to provide secure and controlled access to email and calendar functionalities. This multi-account system supports Microsoft Graph and IMAP, allowing users to manage their correspondence without compromising security. Importantly, GigaMail operates locally on users' machines, ensuring that sensitive data, such as credentials and email content, never touches the agent's processing environment. The tool includes robust permissions, enabling human oversight for actions like sending and deleting emails, supported by an append-only action log that ensures accountability. For the AI/ML community, GigaMail is significant as it presents a hybrid architecture that combines email provider search capabilities with a local SQLite index, enabling efficient offline access and rapid retrieval of information. Features such as sender memory and knowledge file integration allow agents to tailor responses based on previous interactions and specific business documents. The introduction of mandatory human approvals for sensitive operations limits potential misuse of AI capabilities, addressing growing concerns about security and privacy in automated systems. By treating email content as untrusted, GigaMail aims to protect users from threats such as prompt injections while offering a powerful tool for managing communications.