I am using exmh to handle my email (MUA ?). The MTA is smail (is it also the MDA ? What are the differences between MDA and MTA ?). I want to presort my email messages. Can you recommend a way to do it (procmail ? exmh capabilities for this task, if it got any ? other ?). Is the proposed way a popular one ? Is there a HOWTO, or similar staff, that explain how to do it ? Thank you.