Links:
chgrep chgrep searches the input files (or standard input if no files are named) for oldstring and changes them to newstring. grepmail Searches a normal or gzip'ed mailbox for a given regular expression, and returns those emails that match it. Also supports searches constrained by date gtkgrepmail gtkgrepmail is a gtk front-end to grepmail which allows you a GUI interface to search through your sent and saved mail. mail2thread finds threads in a bunch of mail messages and outputs them in various ways. It is rather sophisticated and can be controlled by various options mairix mairix is a tool for indexing and searching email messages stored in maildir folders. mboxgrep a small utility that scans standard Unix mailboxes and displays messages matching a basic, extended, or Perl-compatible regular expression mgrep a small perl utility which displays messages from a mailbox depending on a search pattern
