Set up MailSandbox in CrewAI

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MailSandbox (a fork of Mailpit) is a fast, zero-dependency email testing tool & API with a web UI, SMTP server, Postmark API emulation, and MCP server for AI-assisted debugging.

01Configuration

# MailSandbox via CrewAI
# transport: unknown
# launch: the server's install method

CrewAI connects to MCP servers in code. Use its MCP client with the command/URL below; exact API varies by version.

02Steps

Make sure CrewAI is installed and up to date.
Wire the server into CrewAI using its MCP client API.
Provide any required API keys/credentials as environment variables.
Restart CrewAI and confirm MailSandbox’s tools appear.

03Other runtimes

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04Provenance

config_sourcegenerated from captured install method

last_checked2026-06-29 07:53Z

sourcesAwesome MCP Servers (wong2) [p6]

Next step

Ship MailSandbox to your agents as a governed Loadout — config, scopes, and approval rules in one place.

Build a Loadout

See also: server page · is it safe? · alternatives