Hi there,
I use to work for a company that had an email client that was set up to put emails in an outbound queue by default. This was to give a few minute window gap between when the agent hit's send, and when it's actually sent. This was great because it gave us a window where we could withdraw tickets if we realized an error.
I'm trying to determine if there's some sort of similar solution to that here on Zendesk. I saw the recommendation for Cancel Ticket submit, but that isn't quite the same thing, or even remotely similar.