non-zero otherwise. The default is to indicate failed mail delivery on
any errors, including message file delivery to the filesystem, message
indexing to Notmuch database, changing tags, and synchronizing tags to
maildir flags. The ``--keep`` option may be used to settle for
successful message file delivery.
non-zero otherwise. The default is to indicate failed mail delivery on
any errors, including message file delivery to the filesystem, message
indexing to Notmuch database, changing tags, and synchronizing tags to
maildir flags. The ``--keep`` option may be used to settle for
successful message file delivery.