This component downloads a specific email from your IMAP4 server. You identify the email by the email identification number (ID).
You have an email account that is populated with automatic notification emails from various sources. You want to poll this email account periodically, retrieve all unread messages (mark those read) and then do some processing with the contents of those emails.
First use the "IMAP 4 List" Component to retrieve all the headers of the unread emails in the target email account. Then loop through this array of email headers (each header contains the email's Id) and then retrieve each individual email with the "IMAP 4 Get By Id" component.