Trend Micro Email Encryption provides IMSVA with the ability to perform encryption and decryption of email messages. With Email Encryption, IMSVA has the ability to encrypt and decrypt email messages regardless of the email client or platform from which it originated. The encryption and decryption of email messages on Trend Micro Email Encryption is controlled by a Policy Manager that enables an administrator to configure policies based on various parameters, such as sender and recipient email addresses, keywords or where the email messages (or attachments) contain credit card numbers. Trend Micro Email Encryption presents itself as a simple mail transfer protocol (SMTP) interface and delivers email messages out over SMTP to a configured outbound mail transport agent (MTA). This enables easy integration with other email server-based products, be them content scanners, mail servers or archiving solutions.