Signal & Sequence
Sections

Deliverability

How outbound mail gets authenticated, accepted and placed: SPF, DKIM and DMARC records, sending reputation, and where messages land in the inbox.

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.

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.

Tobias Renn