Comment 24 for bug 1528139

Not really - they show that you also need some exec rules - probably something like
    /bin/sh ix,
    /usr/bin/sendmail Px,

Note that I guessed the directory names (only the program's filename is shown in the messages you provided), and that you'll need a separate profile for sendmail if you use Px.

You'll also need to allow "/dev/null w,", but if the profile has #include <abstractions/base>, it's already included there.