+gchar* modest_tny_msg_get_body (TnyMsg *self, gboolean want_html, gboolean *is_html);
+
+
+
+
+/**
+ * modest_tny_msg_create_forward_msg:
+ * @msg: a valid #TnyMsg instance
+ * @from: the sender of the forwarded mail
+ * @signature: signature to attach to the reply
+ * @forward_type: the type of formatting used to create the forwarded message
+ *
+ * Creates a forwarded message from an existing one
+ *
+ * Returns: a new #TnyMsg, or NULL in case of error
+ **/
+TnyMsg* modest_tny_msg_create_forward_msg (TnyMsg *msg,
+ const gchar *from,
+ const gchar *signature,
+ ModestTnyMsgForwardType forward_type);
+
+/**
+ * modest_tny_msg_create_reply_msg:
+ * @msg: a valid #TnyMsg instance, or %NULL
+ * @header: a valid #TnyHeader instance, or %NULL
+ * @from: the sender of the forwarded mail
+ * @signature: signature to add to the reply message
+ * @reply_type: the type of formatting used to create the reply message
+ * @reply_mode: the mode of reply: to the sender only, to a mail list or to all
+ *
+ * Creates a new message to reply to an existing one
+ *
+ * Returns: Returns: a new #TnyMsg, or NULL in case of error
+ **/
+TnyMsg* modest_tny_msg_create_reply_msg (TnyMsg *msg,
+ TnyHeader *header,
+ const gchar *from,
+ const gchar *signature,
+ ModestTnyMsgReplyType reply_type,
+ ModestTnyMsgReplyMode reply_mode);
+
+
+/**
+ * modest_tny_msg_get_parent_unique_id
+ * @msg: a valid #TnyMsg instance, or %NULL
+ *
+ * gets the unique ID of the 'parent' (the original msg replied to or forward)
+ *
+ * Returns: Returns: a the parent uid, or NULL if there is none.
+ **/
+const gchar* modest_tny_msg_get_parent_uid (TnyMsg *msg);
+
+
+/**
+ * modest_tny_msg_estimate_size:
+ * @plain_body: a string
+ * @html_body: a string
+ * @parts_number: a gint (number of additional parts)
+ * @parts_size: a guint64 (sum of size of the additional parts)
+ *
+ * Estimates the size of the resulting message obtained from the size of the body
+ * parts, and adding the estimation of size headers.
+ */
+guint64
+modest_tny_msg_estimate_size (const gchar *plain_body, const gchar *html_body,
+ guint64 parts_count,
+ guint64 parts_size);