✔️ This issue has been resolved and the fix will be available within the Plato 2.0.1 update.

The Interval, Batch Size, Send Attempts & Enable Outbound Polling options on the Email Settings page have no effect. This is because IConfigureOptions<SmtpSettings> is not correctly setting these properties as expected.

These should be set as shown below...

options.BatchSize = smtpSettings.BatchSize;
options.SendAttempts = smtpSettings.SendAttempts;
options.PollingInterval = smtpSettings.PollingInterval;
options.EnablePolling = smtpSettings.EnablePolling;

This will be resolved for Plato 2.0.1.