I use Ruby net/smtp

```
require 'net/smtp'

```

I send mails using the following method: 

```
Net::SMTP.start(SMTP_SERVER) do |smtp|
  smtp.send_message(message,"mailman-ruby@example.de",reciepent)
end

```

I want to add a subject to the mails i send but couldn't find one in [the documentation](http://ruby-doc.org/stdlib-2.0/libdoc/net/smtp/rdoc/Net/SMTP.html).

What I tried so far is putting the subject into the message like this: 

```
<<END_OF_MESSAGE
Subject: test message
. . . rest of the message
END_OF_MESSAGE

```

Unfortunally that doesnt do the trick! 

Anyone knows how to set subject using 'smtp/net'?