IMF and POP3 connections

Kerry was at the compliance event last week and asked me about the IMF.

I recently (last week) attended the Exchange Compliance and Disaster Recover presentation.
I have setup the IMF recently and have been collecting email via POP3 under SBS 2K3.
I have noticed through monitoring, that the IMF did not recognise all spam emails until I swapped to SMTP delivery at our site.  When using
POP3 it did not detect and did not move any emails into the junk folder, I current have the SCL set to ‘Do nothing’ when emails are categorised as I want to monitor the volumes and get the correct SCL/UCE in place.

Well Paul did a great blogcast on troubleshooting the IMF the other week but didn’t talk about POP3 limitations.  The thing about the IMF is that the IMF only works on smtp connections where the IMF is installed.  The reason that the IMF doesn’t work on the POP3 connector is that the sbs2003 POP3 connector puts the POP3 email into the pickup folder, and this bypasses normal smtp. 

So I’ve blogged about this just in case anyone else is trying to get the IMF working with POP3, and if you want an introduction to the IMF, Ewan did a great introductory blogcast on how the IMF works…