Assertion: thunderbird | /r/CapableOf | download the message headers
Facets:
value: before applying filters
type: TEMPORAL
Source sentences:
text: The official reason Body is not supported by default for remote folders is that Thunderbird only downloads the message headers before applying filters, and adding support for filtering the message body in an IMAP account would require adding support for reading the offline folders (offline message store) in the IMAP filter code.