Over-mailing can lead to a decrease in engagement and an increase in unsubscribes. Here are some signs to watch for:
Increased unsubscribe rates: A sudden spike in unsubscribes may indicate that you're sending too many emails. Lower open rates: If your open rates are dropping, it could be a sign that your audience is becoming overwhelmed. Higher spam complaints: An increase in spam complaints suggests that your emails are not resonating well with your audience.