We are pulling a weekend upgrade from SBS 2003 to 2008 Std. with Exchange 2010. Currently, our Exchange 2010 does not send or receive email. It seems to be connected with the 2003 exchange because I see all the email accounts and I can move email accounts to the new server. But - there's no message flow. All is stacked up in the queue. I'm connected directly to the Internet (actually, junkemailfilter filters out our spam, but we're not going through ISP). I'm pretty familiar with Exchange 2003, but new to Exchange 2010. Anything common I'm missing?