Draftsight activation; email adress with "dot" not accepted

2 problems;

1 - When presented with the activation box within Draftsight, an email adres with a dot is not accepted, e-mail stays red.

Example f.name@draftsight.com is not accepted, fname@draftsight.com is.

2 - When used an adress without dot, the activation e-mail mostly doesn't come.

Kind Regards,

Mike