I followed a migration guide I found here on EE:
I am stuck at the end of step 8 trying to move/replicate the public folders from 2003 to 2010.
At first I noticed a couple thousand emails stuck in a queue because of a unreachable host.
I went to my 2003 ESM and created a routing group to connect both 2003 and 2010 servers. After that I cleared the queue and told 2003 to move all replicas to the 2010 server again. This time I see the emails going through the queue but nothing shows up on my 2010 server.
I am using a smart host that point to a SonicWALL ES200 spamfilter. Should that be removed?