I run email for several companies, and I want to set up my own SMTP gateway to migrate their domains off hosted spam filtering services.
I wanted an opinion from someone who actually runs email operations, what's to your mind the best setup I could get? I am trying to get a reasonable balance between price and time expenditure running one.
I have been considering to setup my own postfix/spamassassin/clamav server, but concerned with complexity. Is there an easy, automated way to setup one? It would also be nice to have some way to monitor queues, disk and other server health related items