To make sure your emails sent from BUSY are going through properly, you should check your email account's "Sent Box" folder.
In some cases, when you send emails through the SMTP server, they might not show up in your own "Sent Box" folder. To ensure you have a record of the emails you send, you can add your own email address in the "CC" (Carbon Copy) or "BCC" (Blind Carbon Copy) field when sending the email. This way, you'll receive a copy of the email in your inbox, and you can confirm that it was sent successfully.