Custom e mail specs doesn't work

It gives error 535.
I don’t want to pay $68 usd for your servers
Emre Guney

This error occuered when I test email settings "send test mail " Incorrect authentication data (535).

Hi Hilmi_Emre_Guney,

Please try to resolve the issue using the suggestions from

If you have any other questions, please let us know.

Thank you!