MCP for Thunderbird finds a calendar clash hiding in another email account in 20 seconds

SaCreFizZ · reddit · 2026-11-10

A developer demos their MCP server for Thunderbird: across 12 email accounts, the AI works without extra logins. Asked 'am I free Thursday?', it checks the calendar (free), finds a dentist appointment email in another account (not free), adds the event, and drafts a reply — nothing sends until the user clicks Send. The real run took about 20 seconds, a practical showcase of cross-account email/calendar agents with human confirmation.

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