note 81979 modified in function.mail by danbrown

If you are using the sendmail app from an exim package or something you don't really need to change the normal parameters PHP gives it (-t -i) as other posts described. I just added "-f myemail@example.com" and it worked. One thing that got me stuck for a few hours was trying to figure out why the return-path was set as the user (user running php) and not what I was setting it with the -f option then I later found at that in order to forcefully set the return-path the user account running the command must be in exim's trusted users configuration! It helps to add trusted_groups as well then everything works fine :) - Richard Sumilang --was-- If you are using the sendmail app from an exim package or something you don't really need to change the normal parameters PHP gives it (-t -i) as other posts described. I just added "-f myemail@foo.com" and it worked. One thing that got me stuck for a few hours was trying to figure out why the return-path was set as the user (user running php) and not what I was setting it with the -f option then I later found at that in order to forcefully set the return-path the user account running the command must be in exim's trusted users configuration! It helps to add trusted_groups as well then everything works fine :) - Richard Sumilang http://php.net/manual/en/function.mail.php