In case someone will have the same problem as me, I solved it.
Well, the main problem was, that I didn't check all LOG files in RD
and it was my mistake :) There was small one: RdMailer.log where I
found info, that my smtp server, via which I send e-mail
notifications, has a problem to send an e-mail. The problem was, that
in Server manager, where i set all needed settings to send an e-mail,
in field "From" at the beginning I wrote simply "RedDot notification"
and it was a very big mistake. I should write
red...@myemail.com,
normal, full e-mail address in order to send e-mail properly, because
RedDot when it send an e-mail, RD puts this "From" field in e-mail
header in the same From field, and when it was"RedDot notification"
SMTP server returned error, that because of high anti-spam rules, it
cannot send an e-mail from account that doesn't exist. After I set
From field with proper e-mail address, RD send normal e-mail
notification without any problems.In the biggest problem, the simplest
solution will be the best one. :)
MarK