I am currently using Thunderbird and it does a great job in filtering spam out of multiple accounts. Installed TheBat Pro trial but it appears that there is no built in spam filtering? I say this because I downloaded a bunch of email which my email provider had flagged some messages as Spam but the messages remained in my Inbox even after I manually went into TheBat and clicked on the dot under the Flag column. In Thunderbird doing this would move that message into the Spam folder. Is this not what TheBat does? I also see there are additional spam filtering addons but they cost additional money.