The usual failure
Deliverability is blamed on 'the algorithm' after a blast. Domain auth was 'set up once'. The list is a museum of unengaged addresses.
What to make true
SPF, DKIM, DMARC as table stakes. Hygiene as a habit. Complaint rate as a weekly number. Sunset is how you keep the inbox.
Worked example
Keep it this plain. A team uses email deliverability as if buying the software installed the meaning. It did not. Deliverability is blamed on 'the algorithm' after a blast. Domain auth was 'set up once'. The list is a museum of unengaged addresses. The move is not a new integration. SPF, DKIM, DMARC as table stakes. Hygiene as a habit. Complaint rate as a weekly number. Sunset is how you keep the inbox.