gistfile1.rb

>> test_email
=> {:body=>"test body", :subject=>"test subject", :authentication=>:plain, :domain=>"heroku.com", :address=>"smtp.sendgrid.net", :from=>"[email protected]", :user_name=>"[email protected]", :port=>25, :to=>"[email protected]", :password=>"XXXXXXXXXXXXXXX"}
>> Pony.mail(test_email)
=> #<Mail::Message:23867391363740, Multipart: false, Headers: <Date: Tue, 02 Nov 2010 13:26:22 -0700>, <From: [email protected]>, <To: [email protected]>, <Message-ID: <[email protected]>>, <Subject: test subject>, <Mime-Version: 1.0>, <Content-Type: text/plain>, <Content-Transfer-Encoding: 7bit>>
>> 

Done via "heroku console"