When sending emails using the email-ext plugin, I'm manually populating the recipient list using the pre-send script feature. This means that the recipient list is empty at first and gets populated during the pre-send step.

Unfortunately an empty recipient list stops the entire process before the pre-send step is even run, with the message: "An attempt to send an e-mail to empty list of recipients, ignored".

It would make sense to let the pre-send script run before checking if the recipient list is empty.