Edit or remove 'signed-by' or 'mailed-by'

Recently I was trying to remove the labels 'signed-by' or 'mailed-by' which displayed the server name of my web hosting company when I do mailing activities from PHP script.

I was actually wanted to have my domain or perhaps my 'fake' domain address to be there. I don't want to display the web hosting company.

The labels are like distracting me as a mailer, because I don't really need that to be displayed. They're like disturbing my privacy.

After having some research, I finally found the answer. There's actually five arguments in the mail() function, instead of just four like this:

mail($mailto,$subject,$message,$header);

The fifth argument is the answer to my question. I believe some of you might get in the same situation.

So lets get straight to the point. Choose one of these below:

1. You want your domain to be displayed; or
   
2. You want nothing to be displayed.
   

You can't have them to display other than that. I.e: You want it to display 'signed-by: google.com' or 'mailed-by: yahoo.com'. No you can't have it. Just choose one of the stated above.

If you want the first choice, do this:

1. Create an email address from your domain, or take one you've had, like admin@yourdomain.com.
   
2. Set your code like this:
   
   mail($mailto,$subject,$message,$header,'-f admin@yourdomain.com');
3. There's no number 3, you're done!
   

If you want the second choice, you only have to do the second one in the first choice. You may change the 'admin@yourdomain.com' to any email you'd like, i.e: myself@yahoo.com.

Easy, huh?