Net::SMTP CRAM-MD5 authentication mechanism not supported

my config.rb

ActionMailer::Base.delivery_method = :smtp

ActionMailer::Base.server_settings = {

:address => “localhost”,

:port => 25,

:domain => “www.our_domain.com”

:authentification => :login,

typo, should be:

:authentication => :login

:user_name => ‘me_admin@rour_domain.com’,

:password => ‘me_admin_password’

}

ActionMailer::Base.raise_delivery_errors = :true

ActionMailer::Base.perform_deliveries = :true

ActionMailer::Base.default_charset = “utf-8”

Best regards

Peter De Berdt