Re: Get a grip...
The Spanish criminal justice system is based on Napoleonic Law which is not at all like Common Law. They're not on trial, they're being investigated by the judge and are held in custody while that investigation is taking place. If you're in any further doubt all you need to do is read the news of groups of people being arrested, investigated, then released a few days later when nothing was found.
As for RiseUp, it uses much the same encryption as the major free providers, i.e. IMAP or POP3 encrypted with TLS and StartTLS between the source and to destination email server. Do some investigating yourself and look at their website.