PMDF System Manager's Guide

Although disclaimer channel processing is done using a regular PMDF channel program, under normal circumstances this channel is never specified directly either in an address or in a PMDF rewrite rule. PMDF controls access to the disclaimer channel via the DISCLAIMER mapping table in the PMDF mappings file.

As PMDF processes each message it probes the DISCLAIMER mapping (if one is present) with a string of the form

IN-CHAN=source-channel;OUT-CHAN=destination-channel;DISCLAIMER

where source-channel is the source channel from which the message is coming and destination-channel is the destination channel to which the message is heading. If a match occurs the resulting string should be a comma-separated list of keywords. Table 22-11 lists the available keywords.

Table 22-11 DISCLAIMER Mapping Table Keywords

Keyword	Action
Channel= channel	Enables disclaimer channel processing using the disclaimer channel named channel.
No	Disables disclaimer channel processing.
Yes	Enables disclaimer channel processing.

A No is assumed if no match occurs.

If the DISCLAIMER mapping table enables the disclaimer channel, PMDF diverts the message from its regular destination to the disclaimer channel. If the disclaimer channel is not enabled, the message is queued to its regular destination channel.

For example, suppose your organization has mandated that all messages have disclaimers added to them if they originate from inside your company and are destined for the Internet. The following mapping would then be appropriate:

DISCLAIMER IN-CHAN=l;OUT-CHAN=tcp_local;DISCLAIMER yes IN-CHAN=tcp_internal;OUT-CHAN=tcp_local;DISCLAIMER yes IN-CHAN=*;OUT-CHAN=*;DISCLAIMER no

If you want to have only a subset of your users use the disclaimer channel, or if you want some users to use a different disclaimer channel than other users, you can redirect people to a different incoming channel using the switchchannel channel keyword and IP-address based rewrite rules. The DISCLAIMER mapping table can then be set up to recognize those channels as the incoming channel and turn on or off the disclaimer channel, or use an alternate disclaimer channel, as desired.