Uberspace .qmail filter script (for Uberspace-v7 accounts)

check_mail_v7.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Installation: Insert this line into your .qmail-* file
# | /path/to/check_mail_v7.py

from datetime import datetime
import sys

BLOCK_SCORE = 8.0
MAILLOG = '/home/myuser/maillog.txt'

RET_SUCCESS = 0
RET_SUCCESSSTOP = 99
RET_HARDFAIL = 100  # Do not use this, it produces masses of bounces
RET_SOFTFAIL = 111


def main():
    sender = ""
    to = ""
    subject = ""
    score = 0.0
    result = RET_SUCCESS

    for line in sys.stdin:
        lline = line.lower()

        if 'x-rspamd-score: ' in lline:
            score = float(line.split(': ')[1].strip())

        if 'subject: ' in lline:
            subject = line.split(': ')[1].strip()

        if 'from: ' in lline:
            sender = line.split(': ')[1].strip()

        if 'to: ' in lline:
            to = line.split(': ')[1].strip()

    if score > BLOCK_SCORE:
        result = RET_SUCCESSSTOP

    with open(MAILLOG, 'a') as f:
        f.write('[{date}] score="{score}" action="{result}" to="{to}" from="{sender}" subject="{subject}"\n'.format(
                date=datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
                score=score,
                result=result,
                sender=sender,
                subject=subject,
                to=to,
                ))

    return result


if __name__ == '__main__':
    sys.exit(main())