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ActionGmailUpdated June 2026

How do I reply to a Gmail message?

Short answer: You can reply to message in Gmail by hand from its own interface, but it won’t repeat itself. On TinyCommand, add the Gmail Reply to Message action to a workflow, map its 5 inputs from any upstream app, and it runs automatically every time the trigger fires. No code, and a free tier to start.

Reply to Message in Gmail — start free All 27 Gmail actions
Reply to Message in Gmail — start free
Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

FieldTypeRequiredDescription
Original Message ID
messageId
stringRequiredGmail message ID — the hex string Gmail assigns to each message. Find via List Messages. Not the RFC822 Message-Id header.
To
to
emailRequiredTo. e.g. "recipient@example.com"
Reply Body
body
htmlRequiredReply Body. e.g. "<p>Thanks for your email...</p>"
CC
cc
stringOptionalCC. e.g. "cc@example.com"
BCC
bcc
stringOptionalBCC. e.g. "bcc@example.com"
Sample request
{
  "messageId": "e.g. 18a1b2c3d4e5f6",
  "to": "recipient@example.com",
  "body": "<p>Thanks for your email...</p>",
  "cc": "cc@example.com",
  "bcc": "bcc@example.com"
}
Returns
{
  "id": "msg456",
  "labelIds": [
    "SENT"
  ],
  "threadId": "thread123"
}

Use these fields in downstream nodes for routing, logging, or error handling.

Triggered by

Apps that pair well as the trigger for Reply to Message.

Any of these apps can fire this action as part of a workflow.

Slack → Gmail
13 Slack triggers
Google Sheets → Gmail
2 Google Sheets triggers
HubSpot → Gmail
18 HubSpot triggers
Stripe → Gmail
10 Stripe triggers
FAQ

Questions about Reply to Message.

What does the Reply to Message action do in Gmail?
Replies to an existing email message, preserving the thread (In-Reply-To and References headers). The default outbound action for autoresponders or AI handoffs.
What inputs does Reply to Message require?
Required: Original Message ID, To, Reply Body. Every input accepts a static value or a variable from any upstream node in your workflow.
Can I use dynamic inputs from earlier workflow nodes?
Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.
What happens if Gmail returns an error?
The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.
Does Reply to Message support batch operations?
Yes. Run Reply to Message inside a Loop node to process arrays. TinyCommand handles Gmail's rate limits automatically so you don't have to throttle manually.
More actions

Other Gmail actions.

Action
Add Labels to Message
Adds one or more labels to an email message in Gmail. Use to file AI-classified mail, mark as Important/Starred, or move into a custom folder.
Action
Create Draft
Creates a new email draft in Gmail with to, cc, bcc, subject, body (text or HTML), and attachments. Used for human-in-the-loop flows where AI drafts and a human approves.
Action
Create Label
Creates a new label in your Gmail account with a name, optional parent, and visibility settings. Useful when classification automation should auto-provision missing labels.
Action
Delete Draft
Permanently deletes an email draft from Gmail by ID. Use for cleaning up superseded AI-generated drafts.
Action
Delete Label
Deletes a label from your Gmail account. Messages with the label keep the message but lose the label assignment.
Action
Delete Message
Permanently deletes an email message from Gmail. Bypasses Trash; use Trash Message instead for the recoverable path.
Reply to Message in Gmail — start free