php - Username without Email Extension in PHPMailer -

i want use university email server send/receive emails project hosts on our university server. have true username , password email. example: our login username "xxxxxx" email address "xxxxxx@metu.edu.tr" on squirrelmail. username has no email extension. can login , see emails using these credentials:

username: xxxxxx

password: yyyyyy

now set phpmailer settings that:

define('smtp_host', 'mail.metu.edu.tr');

define('smtp_port', '587');

define('smtp_secure', 'tls');

define('smtp_user', 'xxxxxx@metu.edu.tr');

define('smtp_password', 'yyyyyy');

here phpmailer error:

smtp -> error: password not accepted server: 535 5.7.8 error: authentication failed: authentication failure  smtp -> server:250 2.0.0 ok  smtp error: not authenticate. 

all settings correct. password correct too. because can send email myself using hosting username "xxxxxx@zzz.com" if set username(email address) "xxxxxx@zzz.com" on mail server, not "xxxxxx". think in university hosting set email adresses without extension. need send/receive emails on host.

how can fix phpmailer problem without intervention host properties.

first check if server accepts passwords plain or md5 hashed. think sending plain.