MAILER.CONF(5)            NetBSD File Formats Manual            MAILER.CONF(5)

     mailer.conf -- configuration file for mailwrapper(8)

     The file /etc/mailer.conf contains a series of lines of the form

     name program [arguments ...]

     The first word of each line is the name of a program invoking
     mailwrapper(8).  (For example, on a typical system /usr/sbin/sendmail
     would be a symbolic link to mailwrapper(8), as would newaliases(1) and
     mailq(1).  Thus, name might be ``sendmail'' or ``newaliases'' etc.)

     The second word of each line is the name of the program to actually exe-
     cute when the first name is invoked.

     The further arguments, if any, are passed to the program, followed by the
     arguments mailwrapper(8) was called with.

     The file may also contain comment lines, denoted by a `#' mark in the
     first column of any line.

     The default mailer is sendmail(8), which will also start by default
     (unless specifically disabled via an rc.conf(5) setting) so that locally
     generated mail can be delivered, if the ``sendmail'' setting in
     /etc/mailer.conf is set to ``/usr/libexec/sendmail/sendmail''.


     This example shows how to set up mailer.conf to invoke the traditional
     sendmail(8) program:

           # Execute the "real" sendmail program located in
           # /usr/libexec/sendmail/sendmail
           sendmail        /usr/libexec/sendmail/sendmail
           send-mail       /usr/libexec/sendmail/sendmail
           mailq           /usr/libexec/sendmail/sendmail
           newaliases      /usr/libexec/sendmail/sendmail
           hoststat        /usr/libexec/sendmail/sendmail
           purgestat       /usr/libexec/sendmail/sendmail

     This example shows how to invoke the postfix(1) MTA suite in place of

           # Emulate sendmail using postfix
           sendmail        /usr/libexec/postfix/sendmail
           send-mail       /usr/libexec/postfix/sendmail
           mailq           /usr/libexec/postfix/sendmail
           newaliases      /usr/libexec/postfix/sendmail

     This example shows the use of the mini-sendmail package from pkgsrc in
     place of sendmail(8): Note the use of additional arguments.

           # Send outgoing mail to a smart relay using mini-sendmail
           sendmail        /usr/pkg/sbin/mini-sendmail -srelayhost
           send-mail       /usr/pkg/sbin/mini-sendmail -srelayhost

     mail(1), mailq(1), newaliases(1), postfix(1), mailwrapper(8), sendmail(8)


     mailer.conf appeared in NetBSD 1.4.

     Perry E. Metzger <>

     The entire reason this program exists is a crock.  Instead, a command for
     how to submit mail should be standardized, and all the "behave differ-
     ently if invoked with a different name" behavior of things like mailq(1)
     should go away.

NetBSD 5.0.1                     July 17, 2004                    NetBSD 5.0.1

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