BuddyPress.org

Hi,
I’m using BP 2.8.2, WP 4.8.
My (temp) website is demo.vsenashi.com it’s in Russian.
I’m not getting BP notification emails. Registration is half WP and half BP, so I get emails, but all other activity BP notifications (messages, comments and new activity) – nothing.
I have already checked spam folder.
I tried Check Email plugin – sends emails.
I tried WP mail SMTP plugin – not working with SMTP, but working with PHP mail(). So I configured this option and still no email notifications.

What can I try to do to solve the problem? I saw many topics about it, but most of them still not solved.