Track campaign open rates

Track open rates for the May promotional campaign to the subscribers who opted in last 18 months. Report opens by device (mobile, desktop), by acquisition source (signup form, paid lead, trade show), and by time of day for the first 72 hours. Alert me if the open rate is more than 20% lower than our historical average of 28% and provide the raw counts and percentages so I can discuss with the content lead.

Before I send the open-rate report to the head of growth, make it easier to act on: surface the three segments with the biggest drop from baseline, show whether subject-line variants were used and their respective opens, flag if open-rate tracking might be distorted by image-blocking or an incorrectly formatted tracking pixel, and suggest two plausible causes that would change who I loop in.

The campaign to our active list returned a 19% open rate, below our 28% baseline. I don’t know if it’s the subject line, a tracking pixel failure, or a deliverability issue from a recent IP warm-up change. Which diagnosis is most likely given a sudden drop and what immediate checks should I run to pinpoint the cause before we notify the team?

We keep seeing campaigns underperform opens but only react after leadership asks. The pattern spans three months and eats credibility. Which habit should I change — automated monitoring thresholds, a pre-send deliverability checklist, or splitting sends by acquisition source — to catch problems earlier and restore trust? Recommend one change and how to enforce it with the team.