mailer_transport="gmail"
mailer_host="gmail"
mailer_user="********"
mailer_password="*******"

Swift_TransportException: Failed to authenticate on SMTP server with username "pgbonino" using 1 possible authenticators

parameters.ini

  mailer_transport:  smtp
  mailer_host:       smtp.gmail.com:465
  mailer_user:       usenrame
  mailer_password:   ***