Using mail.local with Sendmail

The mail.local must be invoked from the local mailer definition in the sendmail.cf file. It must have the following flags set ‘lswS’, meaning the mailer is local, the quote characters should be stripped off the address before invoking the mailer, the user must have a valid account on this machine and the userid should not be reset before calling the mailer. Additionally, ‘fn’ flags may be specified to allow mail.local to generate usual ‘From ’ envelope instead of the one supplied by sendmail.

If you wish to use mail.local with SQL authentication, you may wish to remove the ‘w’ flag, since in that case the user is not required to have a valid account on the machine that runs sendmail.

Here is an example of mailer definition in sendmail.cf

     Mlocal, P=/usr/local/libexec/mail.local,
             F=lsDFMAw5:/|@qSPfhn9,
             S=EnvFromL/HdrFromL, R=EnvToL/HdrToL,
             T=DNS/RFC822/X-Unix,
             A=mail $u

To define local mailer in ‘mc’ source file, it will suffice to set:

     define(`LOCAL_MAILER_PATH', `/usr/local/libexec/mail.local')
     define(`LOCAL_MAILER_ARGS', `mail $u')