You must use one of the passwords to send mail from Heroku.
A good option is Sendgrid
heroku addons:add sendgrid:starter --app=your_app_name
Then in your Padrino app in app.rb inside your App class:
set :delivery_method, :smtp => {
:address => "smtp.sendgrid.net",
:port => 587,
:domain => 'heroku.com',
:user_name => ENV['SENDGRID_USERNAME'],
:password => ENV['SENDGRID_PASSWORD'],
:authentication => :plain,
:enable_starttls_auto => true
}
SMTP- Mandrill .
, Errno:: EPIPE, , , SMTP-, , .