Mozilla ThunderBird

Easy to configure, has many plug-ins and auto update. Never contracted the virus through it - though constantly send. A special feature - an intelligent anti-spam. Smart customers are trimmed around me and went to increase the flow of proposals, purchase, assist. The server is a filter, but can not cope. A clever filter filters the petrel is very accurate, based on the accumulated knowledge base is constantly.

At the beginning of three days should teach him, noting the spam emails. Do not forget to put in the settings - put into a separate spam folder. Over time, the error filter will be no more than 1-2 emails per 1000. In this case, remove the letter from the spam label, and transfer to the main folder.

Download here.