How to set email sender name on the server?

Question

linux

Good day.
There is a dedicated server with a configuration:
Debian 7
Apache 2.2.22
PHP 5.4.4 Emails are sent
from php via sendmail.
Only here letters come from www-data. When sending letters from PHP to the from header, I feed "[email protected]", they still come from www-data.
The server hosts several sites. I would like each site to send mail from "its" name.
How to do it?

Answer 1

Thanks everyone for trying to help, problem solved.
Maybe it will come in handy for someone:
It was in the SSMTP settings
in /etc/ssmtp/ssmtp.conf
to specify FromLineOverride=YES

Answer 2

Have you even tried reading the php documentation? apparently not.
php.net/manual/en/function.mail.php

Answer 3

Extract from documentation:

The additional_parameters parameter can be used to pass additional flags as command line arguments to the program configured to send mail specified by the sendmail_path directive. For example, you can set the sender of an email when using sendmail with the -f option .