Postfleet MCP server

What it does

Postfleet MCP exposes email infrastructure tools so an AI agent can send, receive, reply to, and wait for email through a dedicated mailbox. It is aimed at developers building agentic workflows that need programmatic email access with inbound parsing, classification, and prompt-injection screening built in.

• Create a dedicated mailbox for an agent and send outbound emails on its behalf.
• Poll or wait for an inbound reply and read its parsed contents before the agent acts on them.
• Route outbound mail through a draft approval gate so a human can review before the message is sent.

Tools this server exposes

Tool	Does
list_mailboxes	Returns all mailboxes accessible to the current API key.
create_mailbox	Creates a new agent mailbox under an existing domain.
list_domains	Lists domains registered in the account.
create_domain	Registers a new sending/receiving domain.
verify_domain	Triggers DNS verification for a domain.
send_email	Sends an email from a mailbox immediately.
reply_email	Sends a reply to an existing email thread.
list_inbox	Lists messages in a mailbox inbox.
read_email	Retrieves the parsed contents of a specific email.
wait_for_email	Blocks until a new email arrives in the specified mailbox.
create_draft	Creates a draft email pending approval before sending.
list_drafts	Lists all drafts in a mailbox.
get_draft	Retrieves a specific draft by ID.
update_draft	Updates the content or metadata of an existing draft.
send_draft	Sends a previously created draft.
delete_draft	Deletes a draft without sending it.

Before you enable it

An MCP server runs with whatever access you give it. Start with a development account rather than production, and check which tools the server exposes before you let an agent call them unattended.