Email Schedule Optimisation

Definition

Email schedule optimisation is the practice of analysing historical engagement data to identify when subscribers are most likely to open, click and convert, then scheduling future campaigns around those patterns. This moves beyond the generic "Tuesday at 10am" advice to discover what actually works for a specific audience.

Optimisation can be applied at the list level, segment level or individual subscriber level. List-level scheduling sends to everyone at the best aggregate time. Segment-level adjusts send time by audience group. Individual-level, often called send-time personalisation, schedules delivery to each subscriber at their historically most-engaged hour.

What the Data Typically Shows

• B2B audiences tend to engage most during weekday mornings and early afternoons
• Consumer audiences often show evening and weekend engagement peaks
• Different segments of the same list often have different optimal times
• Your own historical data is significantly more reliable than generic benchmarks

Best Practices

• Test schedule changes against a holdout group to verify that observed patterns produce better results
• Reassess optimal times quarterly — subscriber behaviour shifts with seasons and life changes
• Do not optimise solely for open time; a later send that produces more clicks or conversions is better than a high-open send that drives no action