[Rails] form action in mail (actionmailer)

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> 2. so I changed my appoach to plain html likes
>
> <form action="http://myhostname/mycontroller/myaction" method="post">
> blah blah, most hidden type
> <input type="submit">
> </form>
>
> then, when I click submit from mail client,  Rails identify it as "get 
> request" not "post request".
>

I found it worked as I expected (request "post" action) in web browser 
mail client.
Actually, I suppose above problem come out only Mail.app (mac).

Is there anyone who explain this case ? : )

Thanks for any advance,