A token indicating that there are additional receipt rule sets available to be listed. Pass this token to successive calls of
ListReceiptRuleSets to retrieve up to 100 receipt rule sets at a time.
RuleSets => ArrayRef[Paws::SES::ReceiptRuleSetMetadata]
The metadata for the currently active receipt rule set. The metadata consists of the rule set name and the timestamp of when the rule set was created.