#!/bin/sh
$MAILDIR = "$HOME/.local/share/mail/"

cd $MAILDIR
find . -tfype f -name '.??*' -delete
find . -type f -name '*U=*' | { while read f; do mv "$f" "`echo $f | sed -e 's/,U=[0-9]*//'`"; done }
find . -type f -name '*U=*'