pear install Mail
pear install Net_SMTP

  $mailhost = "ssl://smtp.googlemail.com";
  $mailport = "465";
  $mailuser = "...@...";
  $mailpass = "haslo";
  $to_email = "...@...;

  $headers = array ('From' => "System Domowy <...@...>",
   'To' => $to_email,
   'Subject' => "INFORMACJA Z SYSTEMU DOMOWEGO");

  $smtp = Mail::factory('smtp',
    array ('host' => $mailhost,
     'port' => $mailport,
     'auth' => true,
     'username' => $mailuser,
     'password' => $mailpass));
 
  $mail = $smtp->send($to_email, $headers, $body);

Failed to connect to ssl://smtp.googlemail.com:465 [SMTP: Failed to connect socket: fsockopen(): unable to connect to ssl://smtp.googlemail.com:465 (Unknown error) (code: -1, response: )]