Code zum Blogpost [maildrop-Fallstricke und was man dagegen tun kann](https://golderweb.de/2017/08/maildrop-fallstricke-und-was-man-dagegen-tun-kann/)

.mailfilter

# mailfilter
# Maildrop filter
#
# This file is just for data integrity, it includes the
# actual mailfilter in file "main"
# If any exception occurs while executing main, this file
# makes sure that the affected mail is not dropped

# DO NOT ADD ANY ADDIDTIONAL CODE OUTSIDE THE EXCEPTION SCOPE
# Catch exceptions in actual filter
exception {

	# Include the actual filter
	CONFIG_DIR="$HOME/etc/maildrop"
	include "$CONFIG_DIR/main"

	# If anything worked until now, exiting with success
	# is quite fine
	EXITCODE=0
	exit
}
# DO NOT ADD ANY ADDIDTIONAL CODE OUTSIDE THE EXCEPTION SCOPE

# If anything goes wrong, deliver mail to Maildir
to "$HOME/Maildir"

.qmail

# Deliver email via maildrop-wrapper.sh
|~/bin/maildrop-wrapper.sh

maildrop-wrapper.sh

#!/bin/bash

maildrop ~/.mailfilter

if [ $? -ne 0 ]; then
    # Try to correct file permissions and retry
    chmod 0600 ~/.mailfilter
    maildrop ~/.mailfilter
fi