sendmail, 4th Edition

Tuning Without an Appropriate Keyword

Unfortunately, not all delivery agent equates can be tuned with mc configuration macros. The U= delivery agent equate for the usenet agent is one example. To change such a value, you need to copy the original definition, modify it, and put the modified definition in your local mc configuration file. For example, to add a U= delivery agent equate to the Usenet delivery agent, you might do the following:^[270]

% grep -h Musenet cf/mailer/*
Musenet,    P=USENET_MAILER_PATH, F=USENET_MAILER_FLAGS, S=10, R=20,
            _OPTINS(`USENET_MAILER_MAX', `M=', `, ')T=X-Usenet/X-Usenet/X-Unix,
            A=USENET_MAILER_ARGS $u

Here, the prototype definition for the usenet delivery agent is found. Copy that definition into your mc configuration file and add the missing delivery agent equate:

MAILER(usenet)
MAILER_DEFINITIONS
Musenet,   P=USENET_MAILER_PATH, F=USENET_MAILER_FLAGS, S=10, R=20, U=news:news,
            _OPTINS(`USENET_MAILER_MAX', `M=', `, ')T=X-Usenet/X-Usenet/X-Unix,
            A=USENET_MAILER_ARGS $u

First, the MAILER( ) m4 command causes initial support for the usenet delivery agent to be included. The MAILER_DEFINITIONS section (MAILER_DEFINITIONS on page 716) then introduces your new delivery agent definition. Your new definition follows, and thus replaces, the original definition.

Create a new configuration file, and run grep(1) run to check the result:

% make our.cf
% grep ^Musenet our.cf Musenet, P=/usr/lib/news/inews, F=rlsDFMmn, S=10, R=20, Musenet, P=/usr/lib/news/inews, F=rlsDFMmn, ...