All the e-mail traffic leaving the OSL head office is secured by personal e-mail certificates. If the e-mail recipient supports this, the e-mail communication is encrypted so that external third parties cannot read it.With the certificates, the recipient can be sure that the message actually came from the specified senderWe protect ourselves against spam and viruses with the e-mail security gateway NoSpamProxy developed by “Net at Work” in Paderborn. For example, attacheddocuments: Our email gateways check attachments “live”, convert them into secure formats or do not forward unsafe attachments at all.