FTS indexing of binary attachments is broken in dovecot-2.1.15: the binary data which fts_build_mail_real() sends to fts_build_body_block() (which sends it to fts_backend_update_build_more()) is garbled. This patch ungarbles it but I’m not positive it’s the best fix. --- dovecot-2.1.15/src/plugins/fts/fts-build-mail.c 2012-11-27 02:07:27.000000000 -0600 +++ dovecot/src/plugins/fts/fts-build-mail.c 2013-02-21 19:48:15.000000000 -0600 @@ -178,7 +178,8 @@ *binary_body_r = TRUE; key.type = FTS_BACKEND_BUILD_KEY_BODY_PART_BINARY; } - if (ctx->body_parser == NULL) + if (ctx->body_parser == NULL && + key.type != FTS_BACKEND_BUILD_KEY_BODY_PART_BINARY) ctx->body_parser = fts_parser_text_init(); key.body_content_type = content_type; key.body_content_disposition = ctx->content_disposition;