Redmine

Hello!
I'm configured notification via mail.ru.
My config file:

production:
   email_delivery:
     delivery_method: :smtp
     smtp_settings:
       address: smtp.mail.ru
       domain: mail.ru
       port: 25
       authentication: :login
       user_name: 'test@mail.ru'
       password: 'blabla'

When i send test mail, get error:

Encoding::CompatibilityError (incompatible character encodings: UTF-8 and ASCII-8BIT):
  lib/redmine/i18n.rb:32:in `l'
  app/controllers/admin_controller.rb:68:in `rescue in test_email'
  app/controllers/admin_controller.rb:64:in `test_email'

Environment:
  Redmine version                          2.3.0.stable
  Ruby version                             1.9.3 (x86_64-linux)
  Rails version                            3.2.13
  Environment                              production
  Database adapter                         Mysql2

my session and global variables MySQL:

character set client            utf8
character set connection    utf8    
character set database            utf8    
character set filesystem    binary    
character set results            utf8    
character set server            utf8    
character set system            utf8
character sets dir            /usr/share/mysql/charsets/

Help please!
Thanks!