What email filtering tool was deployed to screen all types of email accounts and preview emails before access?

MailWasher PRO is designed to screen and filter emails before they reach the inbox. It allows users to preview emails, helping to identify and eliminate unwanted messages, such as spam or potentially harmful content, before they are downloaded to the email client. This proactive approach enhances security by allowing users to delete or manage suspicious emails, reducing the risk of phishing attacks and malware infections.

In contrast, other tools listed serve different purposes. SpamAssassin is primarily a server-side filter that assesses incoming emails for spam characteristics rather than allowing users to preview emails directly. The Outlook Spam Filter works within the Microsoft Outlook environment to filter spam but does not provide the same level of email management and preview capabilities that MailWasher PRO offers. Mailchimp is an email marketing service that focuses on creating and sending newsletters rather than filtering incoming messages. Therefore, MailWasher PRO is the most appropriate choice for the requirement of screening and previewing emails.