Does Balsa support filters?
Yes. You can set up filters which will match on any message header (even on user headers, eg like X-Mailer header), or on message body, on message date, message flag (read, replied, flagged…). Moreover you can use simple substring look up or full regular expression search. Each filter has an associated action: every message that matches the filter conditions can be either copied, moved, trashed. You can also use the POP3 filtering backend based on procmail. When the respective POP3 ‘mailbox’ has the ‘filter’ box checked, the downloaded mail is passed on to procmail which will use ~/.procmailrc file as its configuration, so you can share it between Balsa and fetchmail and get consistent behavior no matter you use Balsa or fetchmail for downloading. Simple example ~/.
