ar_mailer not mailing

Hi all,
i've set up ar_mailer. It's all working except the sending over smtp.
Emails are showing up in the emails table.

in enviroment.rb
ActionMailer::Base.delivery_method = :smtp
ActionMailer::Base.smtp_settings = {
  :address => "domain.de",
  :port => 25,
  :domain => "domain.de",
  :authentication => :plain,
  :user_name => "my@mail.de",
  :password => "mypw"
}

Is this correct?

ar_sendmail looks like that: