$maxsize = 50; //max size MB $maxsizeb = $maxsize * 1024 * 1024; $fp = fopen("mails.txt", "rt"); while(!feof($fp)) { $str = fgets($fp); $lp = explode(";", $str); $mbox = imap_open("{pop.mail.ru:110/pop3}INBOX", $lp[0], $lp[1]); $info = imap_mailboxmsginfo($mbox); $size = $info->Size; if($size>$maxsizeb) { echo $lp[0].";".$lp[1]; }; imap_close($mbox); }; fclose($fp);