SMTP error, "Authentication failed"

SMTP error, "Authentication failed"

Trying to setup at andriod smartphone, POP server works as mobile phone can receive email. But SMTP not working by throw the error " Authentication failed" at setup stage. And throw "sending failed" msg after trying to sent from mobile phone.

set up as instructed:
smtp.zohu.com
ssl
465
require sign-in: checked, uncheck it also not working when outgoing
username: entire email address
password: same as pop which is working

any idea please?