ActionMailer + ISP SMTP

I'm new here, and pretty much new on the rails.

I'm trying to set up my application to send emails (needed for salted
hash login)
but i keep getting errors.

i'm sure port 25 is not blocked since i'm able to
send mails
through PHP scripts.

my smtp settings in config/enviroment.rb are:
# Include your app's configuration here:
ActionMailer::Base.smtp_settings = {
  :address => "",
  :port => 25,
  :domain => "localhost",
  :user_name => "USERNAME",
  :password => "PASS",
  :authentication => :login

and i also tried with:
  :authentication => :plain

without :domain
with :domain => "",
with :domain => "",
without username and password

nothing worked...

i don't want to use local smtp (like sendmail) because i'm on a
dynamic IP
and other service providers (like walla\gmail) often block mails from
Dyn IP

any help would be most appreciated


Use “:authentication => nil” if your ISP does not require authentication for SMTP traffic.