Deliverability is not something you set once and forget. You need to evaluate metrics regularly. Inbox placement rate, bounce rate, spam complaint rate, and engagement trends reveal whether providers trust your domain.
You can know which sources are sending emails on your behalf using DMARC reports. This report also includes insights about how often authentication fails and whether unauthorized senders exist.
When performance declines, it is better not to guess. Start by reviewing bounce diagnostics, your sender reputation score, and recent engagement patterns. You might need to slow down your sending pace, warm up a new IP, update the content approach, or improve the authentication settings. Adjustments made from real data usually work much better than trial and error.
