Introduction Mail essentials can virus check all inbound and outbound mail into your company. All mails with viruses will be quarantined for review by an administrator. Mail essentials uses the Norman virus engine. The Norman Anti virus engine is a proven and reliable virus detection engine, which has received many awards and certifications, including the industry leading certifications of ICSA, VirusBTN and Check mark. It is important to note that checking inbound mail with an anti virus engine is only a small part of mail security. It is very important that you set-up content checking of inbound and outbound mail as well, in order to block email with scripts and macros.