That was helpful! The output is: Query(((Tmail AND 0 * QE5-a1wt6bgr-elaine/2/42589-dc960dd3@nlsender05.ui-portal.com) AND_NOT (Kdeleted OR Kspam))) Actually my config has "search.exclude_tags=deleted;spam" set, and the mail IS a spam mail. (I wanted to train bogofilter). Did not know that such an exclusion occurs. Makes sense, though. Adding --exclude=false to the search makes it behave well. Thanks for the help! David Bremner writes: > Jörg Volbers writes: > >> This is the ID which I am using for testing: >> >> E5-a1wt6bgr-elaine/2/42589-dc960dd3@nlsender05.ui-portal.com >> > Can you try > > NOTMUCH_DEBUG_QUERY=y notmuch search > id:E5-a1wt6bgr-elaine/2/42589-dc960dd3@nlsender05.ui-portal.com > > and report the output after "Final query is:" > > d -- http://www.joergvolbers.de https://fu-berlin.academia.edu/jvolbers