For no other reason than a link posted by 
ewx, I counted up the spam trapped by my filter over the last 3 weeks and the last 7 days with their rejection reasons.
| Last 3 weeks |
|---|
| DNSBL listed |
4657 |
| Bcc mail |
3389 |
| HTML mail |
838 |
| SpamAssassin |
199 |
| windows-1251 |
30 |
| spam score |
20 |
| rogue domain |
8 |
| windows-1251 multipart |
5 |
| rogue user |
3 |
| No From: line |
3 |
| base64 mail |
1 |
| Total: |
9153 |
|
| Last week |
|---|
| Bcc mail |
1672 |
| DNSBL listed |
1636 |
| HTML mail |
290 |
| SpamAssassin |
43 |
| spam score |
9 |
| windows-1251 |
4 |
| rogue domain |
2 |
| Total: |
3656 |
|
Those are scarily high figures. :-(
Spam that got through in the last 3 weeks: 72
of which those during the last week: 39
[Recent modifications to the filter would now have junked 31 of those 72.]
Figures of which rule junked each message are of course biased by the order in which they are checked in the filter, which is: Bcc, No From:, DNSBL, rogue domain, rogue user, HTML, base64, windows-1251, SpamAssassin, spam score (with earlier matches taking precedence).
