[ubuntu] Do I need to select to use "procmail" when re-configure the Postfix with Dovecot ?

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http://ubuntuforums.org – Hi all, When I run "sudo dpkg-reconfigure postfix", do I need to say Yes to "Use Procmail for local delivery" ? I'm not sure to answer yes or no AS I configure both Postfix and Dovecot servers. If I do not use "procmail", does dovecot take care the local mail delivery or other default program will handle the local delivery ? thx. (Hardware)