4
ok, i find something more.
when i use a php file just like the example at the homepage of
http://phpmailer.sourceforge.net/ in order to check my phpmail, i got the same error: "SMTP Error: Could not authenticate".
but when i use the very same file at phpmailer 1.71(downloaded from phpmailer.sourceforge.net), it works very well!
i am not good at php programme, could someone help me find out where should i change to fix this mail problem?
thanks
add:
i replaced original class.smtp.php with the file in phpmailer 1.71, test php file then could send mails, but XOOPS still can't, same error as before.