Hi,
I think I resolved it.
File: program/include/rcmail.php
Line: 477
Before: $host = !empty($default_host) ? get_input_value('_host', RCUBE_INPUT_POST) : $default_host;
After: $host = empty($default_host) ? get_input_value('_host', RCUBE_INPUT_POST) : $default_host;
Rid