At this time Avalanche does not support fetching both the header and body in a single command. If you want to get both the header and body you must use both of the following FETCH commands in your action list:
- FETCH_BODY = sequence-Retrieves message bodies associated with messages specified by sequence. Sequence is a string that has the same format as IMAP sequence. For example: FETCH_BODY="1,3,6:10,14:*"