SMTP Security 41
SMTP Security | The 3Com Email Firewall offers a simple mechanism for encrypting mail |
| delivery via SSL (Secure Sockets Layer) and TLS (Transport Layer Security) |
| support. A flexible policy can be implemented to allow other servers and |
| clients to establish encrypted sessions with the 3Com Email Firewall to |
| send and receive mail. |
| The following types of traffic can be encrypted: |
| ■ Server to Server — Used to create an email VPN (Virtual Private |
| Network) and protect company email over the Internet. |
| ■ Client to Server — Many email clients support TLS for sending and |
| receiving mail. This allows email messages to be sent confidentiality |
| from desktop to desktop but without the difficulties of implementing |
| other encryption schemes. |
| Encryption can be enforced between particular systems, such as setting |
| up an email VPN between two 3Com Email Firewalls at remote sites. |
| Encryption can also be set as optional so that users who are concerned |
| about the confidentiality of their messages on the internal network can |
| specify encryption in their mail client when it communicates with the |
| 3Com Email Firewall. |
| The 3Com Email Firewall supports the use of certificates to initiate the |
| negotiation of encryption keys. The 3Com Email Firewall can generate its |
| own site certificates and it can also import Certificate Authority (CA) |
| signed certificates. |
| See “SSL Certificates” on page 94 for more information on installing |
| certificates. |
