tisift

Beta state!

tisift:
scaning folder and sort messages with given filter rules.

tish:
imap shell = imap command line tools.

Example:
# Set MsgId on Mails without one
FOLDER="Archives" ; tils -I "$FOLDER" |grep "\{"|while read LINE ; do tish -x addheader "$FOLDER" "$LINE" "X-New-Header: true" ; done

# Correct Date to second received header:
tish date Archives PATTERN received2

# Import or export mbox
tish exportmbox Archives >file.mbox
tish importmbox Archives <file.mbox


Written in ruby.

Attention: Use on your own risc! You can damage your whole mail data!