This will be the last time I talk about this, but here's my anti-rubbish procmail filter.
It correctly copes with:
- Foreign character sets that I can't read.
- Bounces from joe-jobs.
- Malformed emails.
Obviously edit to suit your tastes. Especially with regard to character sets - it is a wide brush which is tarring a group unfairly. That said in practise it works for me.
If you want real antispam filtering then you should probably be looking at externalising it, or having a layered approach.
ObQuote: Citizen Kane