Your MCP setup probably has filesystem, Slack, GitHub, maybe a database connector. Common stack. Common gap: no email. That gap is more important than most teams realise. Here is the case for fixing it. The world the agent lives in Imagine the agent's day from its perspective. It opens a ticket. The ticket references a customer. The customer's prior emails are in your inbox. The fix the agent ships triggers a notification email to that customer. A reply lands a few hours later. Without an inbox, the agent only sees the ticket — which is half the conversation. Email is the universal envelope. Slack and GitHub are walled gardens. Email crosses every boundary your agent's work eventually crosses: customers, partners, vendors, regulators, internal teams that are not on Slack.…