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markAsSpam adds Gmail’s SPAM system label and removes INBOX in one request. Use it when your automation has positively identified unwanted mail.

Example

Move newly received messages with a known unwanted subject marker to Spam:

Inputs

Every input field also accepts a compatible Signal; the example passes the filtered message ID signal directly.

Output

The action returns a Signal<string[]> containing the modified message IDs in input order. This action requests both state changes together: add SPAM and remove INBOX. It does not delete the messages or remove unrelated labels. Use markAsNotSpam to reverse these two mailbox changes.