F-Secure Internet Gatekeeper for Linux/Administrator’s Guide
18
5.1.2
SMTP Connection
•
Without virus scanning
The e-mail client sends e-mail to mail servers on the Internet through an SMTP server for
outbound e-mail.
•
With virus scanning
When virus scanning is used, Internet Gatekeeper stands between the client and mail server and
operates as the SMTP server for the e-mail client. The client connects to the SMTP server through
Internet Gatekeeper. The client sends outbound e-mail to mail servers on the Internet. Internet
Gatekeeper forwards the mail through the outbound mail server.
SMTP Connection example
M ail server (mail3)
M ail server (mail2)
Client
To: foo@mail2
To: foo@mail3
SM TP server settings:
fsigk
Internet Gatekeeper
(fsigk)
Parent server:
mail1
M ail server (mail3)
M ail server (mail2)
To: foo@mail2
To: foo@mail3
Without virus scanning
With virus scanning
SM TP server settings: mail1
M ail server (mail1)
M ail server (mail1)
Client