'attachement' missed a colon, and 'mimetype' was not added to this table
at all.
+------------------+-----------------------+
| **tag:** **id:** | **from:** **to:** |
|**thread:** |**subject:** |
+------------------+-----------------------+
| **tag:** **id:** | **from:** **to:** |
|**thread:** |**subject:** |
-|**folder:** |**attachment** |
-|**path:** | |
+|**folder:** |**attachment:** |
+|**path:** |**mimetype:** |
| | |
+------------------+-----------------------+
| | |
+------------------+-----------------------+