Signal & Sequence
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Signal & Sequence

Notes on outbound infrastructure — authentication, sending reputation, sequencing and list data — written by the people who run it.

The engagement gap in an outbound stack

Nothing broke on the day the engagement ended. Three weeks later the bounce rate had quadrupled, and the cause was a mailbox nobody read.

Deliverability · Tobias Renn

Why a reverse-ETL sync changes the weekly deliverability review

When bounce data and suppression logic live only in the ESP, the weekly deliverability review is mostly a reconciliation exercise. Moving the source of truth to the warehouse, and closing the loop with a reverse-ETL sync, changes the review from manual data assembly to query-and-confirm.

Deliverability · Tobias Renn