Nicholas, the unfortunate news is that the startup time is a limitation with the backend implementation in SmarterMail 16 and previous versions. We have spent several long months completely optimizing and rewriting the backend in SmarterMail 17. On test environments with a similar configurations--domain and mail account counts--we have consistently seen the startup times drop from around 30 minutes to around 4 minutes or less. I know this doesn't help with your current SmarterMail 16 install. We are very pleased with the optimizations we are providing in SmarterMail 17.