Mail Hook

The Mail Hook trigger gives the workflow a unique inbound email address. Send or forward a message to that address to start a run.

Quick start

Choose the Mail Hook trigger

The trigger panel displays this workflow’s unique address.

Copy the address

Use Copy Address, then add it as a recipient, forwarding destination, or automation target in any email service.

Use the message

Add Data from Trigger and connect the sender, subject, body, or attachments to later actions.

Output	Type	Description
Sender Name	String	Display name of the sender, when provided.
Sender Address	String	Sender’s email address, when provided.
Subject	String	Message subject.
Plain Text	String	Plain-text message body.
HTML	String	HTML message body.
Is Reply?	Boolean	Whether the message has an `In-Reply-To` header.
Message ID	String	RFC 822 message identifier without angle brackets.
Plus Path	String	Text after `+` in the workflow recipient address.
Additional Recipients	List of strings	To, CC, and BCC addresses other than the hook address.
Attachments	List of files	Message attachments with filename and content type.

Some message fields may be null when the sending system does not provide them.

Add a suffix before the @ to carry a lightweight routing value:

workflow-address+invoices@run.example.com

The run receives invoices as Plus Path while still targeting the same workflow.

Additional recipient addresses are deduplicated. The exact address that triggered the workflow is excluded from that list.

Treat inbound email as untrusted input. Validate sender addresses, file types, and message content before performing sensitive actions.