After checking, I found that “Mimecast” is used for keeping the emails to be safe. Once completed, the user is added to a purge list.
According to research by the University of Plymouth in the UK, 75% without links and 64% with links of potential phishing messages made it into inboxes and were not in any way labelled to highlight them as spam or suspicious. Mimecast remove email from mailbox spam and malware attachments still make it through email filters.
