Re: [PATCH v2] git-send-email: add option to specify sendmail command

>In short, it is far from sufficient to just "$concatenate @variables"
>to form a single string.  $sendmail_cmd should be left as-is (after
>all, we do want the shell to split it at $IFS whitespace into tokens),
>but each element of @sendmail_parameters should be protected from
>the shell (both word splitting and $interpolation rules).  Perhaps
>something along the lines of this instead?
>
>    exec ("sh", "-c", "$sendmail_cmd \"\$\@\"", "-", @sendmail_parameters);