On 2014-04-14, Chris <ch2009 at arcor.de> wrote: > On 04/06/2014 02:09 PM, Rafa?? Radecki wrote: >> I have some very large constantly updated mbox >> files > > I don't know a tool to compact them, but I would consider converting > them to Maildir. Although they won't need less space, handling them will > be easier. In the context of the OP, when mutt tries to deal with a message (e.g., deleting, moving to a folder), it can be boatloads faster, since handling the message works on a small file which contains just that message. Deleting a message from an mbox mailbox, for example, requires rewriting the entire changed mbox file to disk (minus the deleted message). Deleting a message from a Maildir mailbox is just removing one file from a directory. --keith -- kkeller at wombat.san-francisco.ca.us