I installed the sendEmail addon with pakfire which installs /usr/local/bin/sendEmail OK but I think it has incorrect owners and permissions.
As installed it has: -rwxr-xr-x 1 503 tape 80215 Dec 6 2012 sendEmail
which I think should be: -rwsr-x--- 1 root nobody 80215 Dec 6 2012 sendEmail
This patch to lfs/sendEmail should correct it
diff -u lfs/sendEmail lfs/sendEmail.1 --- lfs/sendEmail 2019-01-20 10:07:56.128391962 +0000 +++ lfs/sendEmail.1 2019-02-02 18:08:58.823295469 +0000 @@ -63,7 +63,8 @@ @$(PREBUILD) @rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar zxf $(DIR_DL)/$(DL_FILE) cd $(DIR_APP) && cp -pvf sendEmail /usr/local/bin - chmod 755 /usr/local/bin/sendEmail + chown root.nobody /usr/local/bin/sendEmail + chmod 04750 /usr/local/bin/sendEmail @rm -rf $(DIR_APP) @$(POSTBUILD)
HTH
Rob