getContent() returns the encoded content of the
MimePart as a string using the encoding specified in the attribute
$encoding. Valid values are Zend_Mime::ENCODING_* Characterset conversions are
getHeaders() returns the Mime-Headers for the
MimePart as generated from the information in the publicly accessible
attributes. The attributes of the object need to be set correctly before
this method is called.
$charsethas to be set to the actual charset of the content if it is a text type (Text or HTML).
$idmay be set to identify a content-id for inline images in a HTML mail.
$filenamecontains the name the file will get when downloading it.
$dispositiondefines if the file should be treated as an attachment or if it is used inside the (HTML-) mail (inline).
$descriptionis only used for informational purposes.
$boundarydefines string as boundary.
$locationcan be used as resource URI that has relation to the content.
$languagedefines languages in the content.