An email address. A fax number. A telephone number. The priority of a message. A list of encodings. An email data structure. The recipient of the email. The carbon copy recipients of the email. The blind carbon copy recipients of the email. A reply shall be sent to this address. The subject of the message. The actual message text, i.e. the body of the email. The attachments of the email. An email data structure. A datatype representing the data to send via fax. A datatype representing the data to send via fax. The recipient(s) of the fax. The recipient fax number(s). A domain name to broadcast the fax to. The data to send via fax. The files to send via fax. A plain text to send via fax. A message. A message. The header of the message contains necessary meta information and can be retrieved separately. The messages text body. The attachments of the message. The header information of a message. The header information of a message. The receivers identity. The identity to use when replying to this message. The identity of the users that should receive a carbon copy of this message. The identity of the users that should receive a blind carbon copy of this message, i.e. all the other users will not see that the message has been sent to those users. The identity of the message sender. The unique ID if the message. If the message is a reply to another message, then this field indicated the ID it refers to. The timestamp when the message has been sent. The character encoding of the message (subject and text). The message's subject. The priority of the message. If this flag is set, a message will be sent back to the "from" address when the message has been downloaded by the receiver ("to" addresses only). If this flag is set, a message will be sent back to the "from" address when the message has been delivered to the receiver's message box ("to" addresses only). The extension fiields of a message will remain untouched by any service forwarding the message. The number of attachments if any. This field will be set by the service. An array of message headers. An array of message headers.