use Minetro\Imap\ImapReader;

$reader = new ImapReader('{yourdomain.cz:143/imap}INBOX', $username, $password);
$emails = $reader->read(ImapReader::CRITERIA_UNSEEN);

// Iterate all emails
foreach ($emails as $email) {
    
    // Iterate all email parts
    for ($i = 0; $i < $email->countBodies(); $i++) {
        
        // Get text (encode with right encoding..)
        $text = $email->getBodySectionText($i);
        
        echo $text;
    }
}