mboxgrep is a small utility that scans a mailbox and displays messages matching a basic, extended, or Perl-compatible regular expression. It supports mbox, MH, nnmh, nnml, and maildir folders.
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Support for mbox folders compressed with the bzip2 algorithm has been implemented. Compilation issues on recent Red Hat systems and a bug that caused problems with deleting files from mbox folders have been fixed.
Crashes which occured upon reading of MH folders have been fixed, as well as a potential problem with mbox and maildir folders with the same cause. MH and maildir backends no longer read files which are not RFC 2822 messages. The ability to read gzip compressed mbox folders from standard input has been added, too.
