MAILguardian - Version 1.0 No longer a question of whether or not to secure corporate e-mail communications. The question is which security software performs the best. MAILguardian delivers strong security for the lowest overall cost; requires no training and minimum support; and is easy enough to be used by novice users. The key to meeting the above needs is transparency. With real transparency, no user training or support is necessary. E-mails are sent faster and more efficiently, leading to an increase in user productivity. Transparency results in far less wasted time since most support calls are usually the result of user error. Once installed, the user barely notices it's there and doesn't need to do anything else.