error - "server says 5.7.0 authentication failed"

I just installed emclient 2.7. When i setup my account. its asking me smtp password every time i send any mail. i have to click on OK button twice or thrise. then my mail sent. I have saved my both pop3 and smtp passwords. But same problem occurring again and again. so please help me

error - “server says 5.7.0 authentication failed”

can I ask you what provider do you use?

Hey finally i found solution to this problem my self. Thanks

can I ask what was the problem? It can help us to solve similar problems with other users in the future.