It would be great if emails could be sent to registrants using custom filters/criteria and not just the categories Accepted or Declined. (e.g. custom registration date range to send message to individuals that registered after x date)
I sometimes need to send emails based on my own criteria.
I create custom contact questions and filter using the answer to the question.
I'll export attendee contact records and import them back with whatever my answer is.
Curious why you choose to use custom contact fields in that situation instead of internal information fields? I prefer not to add custom contact fields unless I absolutely have something new to store across many contacts.
@Evan Ring Good point. Internal questions are a better choice. I don't think internal questions where available a few years ago so I used contact questions.