...datenbankabfrage, um E-Mail-Adressen zu bekommen

$adminMails = '';
          
          if ($this->db->affected_rows()>0) {      
            while ($row = $this->db->fetch_assoc($result)) {
        			$adminMails .= $row['email'].',';           // um an mehrere Leute zu verschicken
        		}
        	} else {
            //
          }
      		
      		if (!empty($adminMails)) {
            $adminMails = substr($adminMails,0,-1);
          } else {
            $adminMails = 'meineDomain@gmx.net';
          }
      		
      		$message = 'Ein Nachricht über Ablauf des Workflows oder ähnliches';
          $subject = "Bitte Bearbeiten";
          $to = $adminMails;
          if (!empty($myRow['email'])) {
            $from = 'From: '.$myRow['email'];
          } else {
            $from = 'From: meine2Domain@gmx.net';
          }
          $isSend = mail($to, $subject, $message, $from);
          
          echo ($isSend) ? "true" : "false";
        }

[mail function]
; For Win32 only.
SMTP = localhost
smtp_port = 25

; For Win32 only.
;sendmail_from = me@example.com

; For Unix only.  You may supply arguments as well (default: "sendmail -t -i").
;sendmail_path = "C:\Programme\xampp\sendmail\sendmail.exe -t"

; Force the addition of the specified parameters to be passed as extra parameters
; to the sendmail binary. These parameters will always replace the value of
; the 5th parameter to mail(), even in safe mode.
;mail.force_extra_parameters =