The Outgoing server (SMTP) %S does not seem to support encrypted passwords. If you just set up the account, try changing the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)' to 'Password, transmitted insecurely'. If it used to work but now doesn't, you may be susceptible to getting your password stolen.
Le servitor de exito (SMTP) %S non pare supportar contrasignos cryptate. Si tu ha justo ora configurate iste conto, tenta cambiar le 'Methodo de authentication' in 'Parametros de contos | Servitor de exito (SMTP)' a 'Contrasigno, transmittite sin securitate'. Si illo functionava antea e ora subito falle, es possibile que alcuno tenta furar tu contrasigno.