ciao!

ho un problema con phpmailer e l'invio tramite yahoo.
io ho messo queste opzioni:
Codice PHP:
$email->IsSMTP();
$email->SMTPDebug = 2;
$email->SMTPAuth = true;
$email->SMTPSecure = 'ssl';
$email->Host = 'smtp.mail.yahoo.com';
$email->Port = 465;
$email->Username = 'email_yahoo';
$email->Password = 'pwd_yahoo';
$email->SetFrom('email_yahoo', 'nome'); 
ottengo sempre questo:
codice:
2019-05-06 09:26:43 SERVER -> CLIENT: 220 smtp.mail.yahoo.com ESMTP ready
2019-05-06 09:26:43 CLIENT -> SERVER: EHLO www.sito.it
2019-05-06 09:26:43 SERVER -> CLIENT: 250-smtp420.mail.ir2.yahoo.com  Hello www.sito.it  [IP_SITO_WEB])250-PIPELINING250-ENHANCEDSTATUSCODES250-8BITMIME250-SIZE  41697280250 AUTH PLAIN LOGIN XOAUTH2 OAUTHBEARER
2019-05-06 09:26:43 CLIENT -> SERVER: AUTH LOGIN
2019-05-06 09:26:43 SERVER -> CLIENT: 334 VXNlcm5hbWU6
2019-05-06 09:26:43 CLIENT -> SERVER: <credentials hidden>
2019-05-06 09:26:43 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2019-05-06 09:26:43 CLIENT -> SERVER: <credentials hidden>
2019-05-06 09:26:43 SERVER -> CLIENT: 535 5.7.0 (#AUTH005) Too many bad auth attempts.
2019-05-06 09:26:43 SMTP ERROR: Password command failed: 535 5.7.0 (#AUTH005) Too many bad auth attempts.
SMTP Error: Could not authenticate.
2019-05-06 09:26:43 CLIENT -> SERVER: QUIT
2019-05-06 09:26:43 SERVER -> CLIENT: 
2019-05-06 09:26:43 SMTP ERROR: QUIT command failed: 
SMTP Error: Could not authenticate.
consigli???