$full_value
$full_value : string
Full header value.
This class represents the Message-ID header value (RFC 2822 [3.6.4]).
sendEncode(array  $opts = array()) : array
                Returns the encoded string value(s) needed when sending the header text to a RFC compliant mail submission server.
| array | $opts | Additional options: 
  | 
                            
An array of string values.
create(string  $prefix = 'Horde') : \Horde_Mime_Headers_MessageId
                Creates a Message-ID header conforming to RFC 2822 [3.6.4] and the standards outlined in 'draft-ietf-usefor-message-id-01.txt'.
| string | $prefix | A unique prefix to use.  | 
                            
Message-ID header object.