``(thread (matching (from bob@example.com) (to bob@example.com)))``
Match any (messages in) a thread containing a message from
"bob\@example.com" and a (possibly distinct) message to
``(thread (matching (from bob@example.com) (to bob@example.com)))``
Match any (messages in) a thread containing a message from
"bob\@example.com" and a (possibly distinct) message to