User Guide

90 Kaspersky Anti-Spam 3.0
• PipeOutDataTimeout=5...600 – timeout for transfer of data through a
socket or program defined by the PipeOutgoingAddr parameter.
• PipeMultipleMessagesAllowed – creation of message copies in cases
when filtering results are different for different users. The possible values
are yes, no.
• PipeUseXForward – support for the XForward command that allows
retrieving the IP address of the server from which a message came (only
when Postfix is used). Possible values are yes, no.
• Pipe8BitHack – use of 8BITMIME extension. Possible values are yes,
no. Specify yes if your mail server is configured for support of 8BITMIME
extension.
• PipeBufferedIO – use of buffering during processing of mail messages.
Buffering allows you to speed up message processing by using additional
volumes of RAM. Possible values are yes, no.
The specifics of using kas-pipe client module:
• Since mail messages are sent to kas-pipe over SMTP or LMTP, it is
impossible (for all mail servers except for Postfix) to define the IP address
of the server from which a message came. All DNS checks can be
performed only on addresses contained within the Received headers. If
you are using Postfix mail server, set the PipeUseXForward to yes so
that kas-pipe can retrieve the IP address of the server from which a
message came.
• Since kas-pipe is integrated with the mail server after the incoming
message queue, the client module cannot perform the reject action
during SMTP session. If the reject this message action is chosen for a
message, then the sender will receive a bounce message.
A.2.4.1. Configuring Postfix to work with kas-
pipe
This section provides an example of the kas-pipe configuration for the Postfix
mail server that implements the following operational scheme:
• kas-pipe acts as a content filter (content_filter).
• kas-pipe receives mail through the localhost:9026 network socket and the
kas3scan service defined manually in the Postfix configuration file.
• kas-pipe transfers processed mail to Kaspersky Anti-Spam to the
localhost:9025 socket, via the SMTP protocol.