Errno::ECONNREFUSED (Connection refused - connect(2)): sending email in production

I don't know how to get more info about this issue on my remote server ( Linux/Debian6 - Qmail)

localhost testing is fine , so my class UserMailer < ActionMailer::Base is rendering correctly the email ( checked in the development log)

now, testing the remote SMTP server , via the production console, using : ActionMailer::Base.smtp_settings = {:address => "",:port => 587,:domain => "",:authentication => :login, :user_name => "",:password => "xxxxxxxxxxxx",:enable_starttls_auto => false}

class MyMailer < ActionMailer::Base def test_email @recipients = "" @from = "" @subject = "this is a subject" @body = "this is the body" end end

MyMailer::deliver_test_email is delivering fine this test email

I used these smtp_settings, in a specific initializer file : config/initializers/mail.rb but then I get the Errno::ECONNREFUSED in production log, right after the email rendering ...

how can I check what's wrong ? the production log doesn't give me enough info ...

thanks for your feedback .. I'm lost in translation ...

[SOLVED] but don't know why ... I changed :address => "" to :address => "localhost" and it's now correctly sending the email... but why the :address => "" was running fine in the rails console ?? and not when the app is running ? any clue ?