Transactional email suggestion

Please consider putting a limit on the number of "marketing" emails sent to any individual email address for a particular trigger. For example, if I have a Bouldering Day Use customer sign up and it triggers an email upselling a 7 or 14 day Punch Card, I would prefer that they are only emailed this offer once or twice particularly if they come in multiple times per month. Just a "Max Emails Sent for this Trigger" text field would need to be added to the trigger setting screen.

We LOVE the transactional emails!