| === FetchedFrom | |
| Matches mail with a header set by Fetchpop X-fetched-from | |
| fetchpop sets X-fetched-by to the "name" of the fetchpop fetch task. | |
| This is used to match all mail fetched from a specific pop account. | |
| Once the condition is met the header is stripped from the message to prevent looping if | |
| the mail is re-inserted into the spool. |