Users are now able to create ticket rules based on the "To:" field of an email that allows to cover more scenarios.
For example, you have one mailbox and one alias for it (sales@replyco.com as mailbox and billing@replyco.com as its alias), and you would like to affect tickets sent to billing@replyco.com only. In this case, we need to affect only tickets that have "To: billing@replyco.com" in the email's meta-data.