Table 4–4 summarizes the template formats.
Table 4–4 Summary of Template Formats for Rewrite Rules| Template | Usage | 
|---|---|
| A%B | A becomes the new user/mailbox name, B becomes the new host/domain specification, rewrite again. | 
| A@B | Treated as A%B@B. | 
| A%B@C | A becomes the new user/mailbox name, B becomes the new host/domain specification, route to the channel associated with the host C. | 
| A@B@C | Treated as A@B@C@C. | 
| A@B@C@D | A becomes the new user/mailbox name, B becomes the new host/domain specification, insert C as a source route, route to the channel associated with the host D. |