class Mail::Message

def mime_version( val = nil )

mail.mime_version #=> '1.0'
mail.mime_version '1.0'

Example:

Also allows you to set the MIME version by passing a string as a parameter.

mail.mime_version #=> '1.0'
mail.mime_version = '1.0'

Example:

Returns the MIME version of the email as a string
def mime_version( val = nil )
  default :mime_version, val
end