Any one who owns Firetrust Benign(B9) software will have problems receiving emails after SP2 installed. The repsonce from firetrust:
If you have Windows XP Service Pack 2 (SP2) installed, then Microsoft advise they have a fix available, but you must contact them directly for the fix.

Owners have to call Microsoft and talk to tech support to download the KB884020 fix. You can not download from the websight. Microsoft emails a link and password to you . Once installed Firetrust B9 will work again.

For those of you wondering what Firetrust B9 is? It scans your email for harmfull stuff / tracking, before you read it in outlook/outlook express.