I've a single host with CentOS 6.3. I manage that host via SSH. The server itself is
servername.foo.com. On this host I've multiple, unrelated httpd vhosts.
The problm is: when one vhost sends a mail with PHP mail(), the sent mail header contains multiple
servername.foo.com traces (Message ID is email@example.com, Received by is servername.foo.com and so on).
The mail are sent by postfix. No other mail services are used on this server.
The question is: how can I sent e-mail from each vhost pretending to be thatVhost.com instead of leaving traces of servername.foo.com in the mail headers?