lastFreshStart property
The date and time at which the reputation metrics for the configuration set were last reset. Resetting these metrics is known as a fresh start.
When you disable email sending for a configuration set using UpdateConfigurationSetSendingEnabled and later re-enable it, the reputation metrics for the configuration set (but not for the entire Amazon SES account) are reset.
If email sending for the configuration set has never been disabled and later
re-enabled, the value of this attribute is null.
Implementation
final DateTime? lastFreshStart;