Unverified50% confidenceFactExact time
The Gmail API's messages.send has no idempotency key parameter; after POSTing a raw message, you either get back a message id or the connection drops and you get nothing.
1
Sources
50%
Confidence
Long-term
Relevance
10/11/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedSending an email is not itself an idempotent operation; only after the email service provider accepts the request and returns a message ID can the email be confirmed as sent.74% similarUnverifiedThe Gmail trigger event is set to "On message received," and a filter can be used to process only inbox or important emails, with the polling frequency limited by the Gmail API72% similarUnverifiedYou must send the raw MIME yourself via the raw field of Gmail users.messages.send; otherwise Gmail will assign its own Message-ID and overwrite the set value.71% similarUnverifiedGmail stores the Message-ID of emails, keeps them searchable, and retains the SENT label on saved copies.70% similarUnverifiedEmails generated by the workflow are not sent directly but are saved as Gmail drafts, preserving a manual review step.69% similar
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