Reply emails

Enable the mailbox’s Reply email toggle and BounceBox sends the extracted result as a reply to the original email — useful when the receiving end is a person or a mailbox-based workflow rather than an API. Delivery is optional: with both delivery toggles off (the default), results stay in the inbox and you download them per item — no reply setup needed.

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Configuration

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Placeholders

Use these in the subject and body templates — click the + button next to a template field to insert one at the cursor:

• {{mailbox}} — the mailbox address the email was sent to
• {{received_at}} — when the email arrived
• {{email_id}} — the email’s identifier
• {{from}} — the original sender
• {{subject}} — the original subject
• {{attachments}} — the attachment list
• {{data}} — the extracted JSON
• {{data.<field>}} — a single extracted field, e.g. {{data.invoice_number}}

Missing fields render as empty strings — no warning is added for them.

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File attachments (CSV / Excel)

With Format set to CSV or Excel, the reply attaches the extracted data as a file. The data is flattened deterministically:

• Top-level scalar fields become key/value rows.
• Top-level arrays of objects become tables — one sheet per array in Excel; CSV uses the first table.
• Nested objects and arrays of scalars are JSON-encoded into the key/value rows.

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Daily and weekly digests

With Schedule set to Daily digest or Weekly digest, processed results are held instead of replied to immediately. A daily digest goes out every day at 17:00 UTC; a weekly digest goes out every Sunday at 17:00 UTC. Each digest is one email per mailbox containing every pending result — each with its subject, sender and received time, plus the extracted JSON. With a CSV or Excel format, each result is attached as its own file (up to 25 attachments; the remainder is listed in the body).

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Spend summary for invoice mailboxes

Mailboxes using the Invoice template get a spend summary at the top of every digest, daily or weekly. Weekly invoice digests arrive with the subject BounceBox weekly spend report. The summary shows:

• The number of invoices, plus how many had no readable total.
• Total spend and total tax per currency. Amounts in different currencies are never added together.
• The top 5 suppliers by spend in each currency. Supplier names that differ only in capitalization or spacing are combined.

Invoices without a currency are grouped under (no currency), and invoices without a supplier name under (unknown supplier). If you switch a mailbox from a digest schedule to Every email, results that were already held go out with the next daily digest. A failed digest send keeps the results pending and retries on the next run of the same schedule. Digests follow the same loop protection as regular replies — a mailbox whose reply address points back at BounceBox has its pending results cleared without sending.

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Loop protection

A reply email that triggers another reply can spiral into a loop — two automated systems answering each other. BounceBox suppresses replies that would bounce back into BounceBox addresses or into known automated senders (auto-submitted and bulk mail), and caps reply storms, so configuring a reply output can’t create an email loop.

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Retries

Reply delivery is retried up to 3 attempts with growing backoff, same as webhooks. Each attempt appears in the delivery log. Digest sends appear in the delivery log as digest entries.