F-Secure Internet Gatekeeper for Linux/Administrator’s Guide
156
④
If the connection fails:
1)
The following is sent to the client:
-ERR Can't Connect to (Server host: Server port)
errmsg=[Connection error message]
For connection error messages, see “
Connection Error Messages
”, 162.
⑤
The following is sent to the server: USER [User name]
⑥
Receives a response from the server.
⑦
The following is sent to the client: [Server response information]
QUIT command
1 If connected to a server:
①
The following is sent to the server: [Client request information]
②
Receives a response from the server.
③
The following is sent to the client: [Server response information]
2 If (1) above does not apply:
①
The following is sent to the client:
+OK Quit
PASS
/
APOP
/
AUTH
commands
1 If user restriction with the APOP command is enabled:
①
If the user is not added:
1)
The following is sent to the client: -ERR Invalid Account Auth.
2 The following is sent to the server: Client response information
3 Receives a response from the server.
4 If the server response is successful:
①
Add the client IP address to the POP-before-SMTP database.
RETR command
1 The following is sent to the server: Client response information
2 Mail is received.
3 Mail is scanned for viruses and spam.
4 If a virus or spam is detected:
①
Virus logs are recorded.
②
A notification is sent to the administrator (if enabled).
5 If a virus is detected and the action on detection is “Delete”:
①
The following is sent to the client:
Received from FSIGK
:
Current time(RFC822 format)
X-Virus-Status
:
infected([Product name]) with [Detection name]
Date
:
[Date of header] (If it exists)
To
:
[To of header] (If it exists)
Cc
:
[Cc of header] (If it exists)
[
Information of the detection notification message
]