Is there any way to execute PHP mail() function with some arguments so sendmail will load different configuration? Something similar like Python can do with a code below
ssmtp = "/usr/sbin/ssmtp"
args = [ssmtp, '-v', '-v', '-v', '-C', '/etc/ssmtp/ssmtp-locrelay.conf', to_address]
The binary can be changed with the sendmail_path directive and command-line arguments go as $additional_parameters:
bool mail ( string $to , string $subject , string $message [, string $additional_headers [, string $additional_parameters ]] )