Anyone have any openwave mail MX opinions or experience good or bad?
Every mail product that costs lots of money will yield a worse overall solution that using a good free/open-source mail software (postfix, qmail, exim... pick one) and spending money on people with good technical skills to tune and adapt the system. Unless, of course, your financial resources are unlimited...
Design question: Is it better to have integrated or seperate Anti-spam and Anti-virus built into the mail platform?
There are some design mistakes (such as trying to do these time-consuming process synchronously) that both integrated and isolated anti-spam/virus solutions have shown... the interesting thing with separate solutions is that you can see the architeture from the configuration instructions, so someone can quickly tell if that solution will scale or not. Using monolithic or separate solutions will have some strategic consequences, but design issues can arise in both. Rubens