SOLVED. No confirmation email is send automatically

[ironbone]

I have solved this problem.
The problem was the conflict between DPCalendar and VirtueMart. The DPCalendar also install and use tcpdf.
First it has blocked new fonts in VirtueMart and the solution was to inactive some of their plugins.
But it was not enough and I had still the above described problem. The final solution was to  uninstall completely DPCalendar.

Thank you  for help.