[Mimedefang] Where to put various tests?

[David F. Skoll]

Nigel Allen wrote:

> I need to do the following and am not sure where within the filter I
> should put the logic.

> If the sender is using an address from a given domain (internal) I need
> to extract a special x-header and see if if it's contents a) occurs in a
> text file or b) occurs as a folder in a given location.

> If neither of these is true I need to reject the message with a reason
> for rejection and get them to re-send.

> Should I do this in filter_sender or where?

Anything that needs headers or body must go in filter_begin, filter or
filter_end.  I typically do this kind of processing in filter_begin.
(You can't do it in filter_sender because you don't have headers yet.)

Regards,

David.