103 lines
4.0 KiB
Python
Executable File
103 lines
4.0 KiB
Python
Executable File
#!/usr/bin/python3
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import re
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import dateutil.parser
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import mailconfig
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import utils
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def scan_mail_log(logger, env):
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collector = {
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"other-services": set(),
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"imap-logins": { },
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"postgrey": { },
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"rejected-mail": { },
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}
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collector["real_mail_addresses"] = set(mailconfig.get_mail_users(env)) | set(alias[0] for alias in mailconfig.get_mail_aliases(env))
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with open("/var/log/mail.log") as log:
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for line in log:
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scan_mail_log_line(line.strip(), collector)
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if collector["imap-logins"]:
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logger.add_heading("Recent IMAP Logins")
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logger.print_block("The most recent login from each remote IP adddress is show.")
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for k in utils.sort_email_addresses(collector["imap-logins"], env):
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for ip, date in sorted(collector["imap-logins"][k].items(), key = lambda kv : kv[1]):
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logger.print_line(k + "\t" + str(date) + "\t" + ip)
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if collector["postgrey"]:
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logger.add_heading("Greylisted Mail")
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logger.print_block("The following mail was greylisted, meaning the emails were temporarily rejected. Legitimate senders will try again within ten minutes.")
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logger.print_line("recipient" + "\t" + "received" + "\t" + "sender" + "\t" + "delivered")
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for recipient in utils.sort_email_addresses(collector["postgrey"], env):
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for (client_address, sender), (first_date, delivered_date) in sorted(collector["postgrey"][recipient].items(), key = lambda kv : kv[1][0]):
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logger.print_line(recipient + "\t" + str(first_date) + "\t" + sender + "\t" + (("delivered " + str(delivered_date)) if delivered_date else "no retry"))
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if collector["rejected-mail"]:
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logger.add_heading("Rejected Mail")
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logger.print_block("The following incoming mail was rejected.")
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for k in utils.sort_email_addresses(collector["rejected-mail"], env):
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for date, sender, message in collector["rejected-mail"][k]:
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logger.print_line(k + "\t" + str(date) + "\t" + sender + "\t" + message)
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logger.add_heading("Other")
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logger.print_block("Unrecognized services in the log: " + ", ".join(collector["other-services"]))
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def scan_mail_log_line(line, collector):
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m = re.match(r"(\S+ \d+ \d+:\d+:\d+) (\S+) (\S+?)(\[\d+\])?: (.*)", line)
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if not m: return
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date, system, service, pid, log = m.groups()
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date = dateutil.parser.parse(date)
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if service == "dovecot":
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scan_dovecot_line(date, log, collector)
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elif service == "postgrey":
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scan_postgrey_line(date, log, collector)
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elif service == "postfix/smtpd":
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scan_postfix_smtpd_line(date, log, collector)
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elif service in ("postfix/qmgr", "postfix/pickup", "postfix/cleanup",
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"postfix/scache", "spampd", "postfix/anvil", "postfix/master",
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"opendkim", "postfix/lmtp", "postfix/tlsmgr"):
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# nothing to look at
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pass
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else:
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collector["other-services"].add(service)
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def scan_dovecot_line(date, log, collector):
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m = re.match("imap-login: Login: user=<(.*?)>, method=PLAIN, rip=(.*?),", log)
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if m:
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login, ip = m.group(1), m.group(2)
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if ip != "127.0.0.1": # local login from webmail/zpush
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collector["imap-logins"].setdefault(login, {})[ip] = date
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def scan_postgrey_line(date, log, collector):
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m = re.match("action=(greylist|pass), reason=(.*?), (?:delay=\d+, )?client_name=(.*), client_address=(.*), sender=(.*), recipient=(.*)", log)
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if m:
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action, reason, client_name, client_address, sender, recipient = m.groups()
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key = (client_address, sender)
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if action == "greylist" and reason == "new":
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collector["postgrey"].setdefault(recipient, {})[key] = (date, None)
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elif action == "pass" and reason == "triplet found" and key in collector["postgrey"].get(recipient, {}):
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collector["postgrey"][recipient][key] = (collector["postgrey"][recipient][key][0], date)
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def scan_postfix_smtpd_line(date, log, collector):
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m = re.match("NOQUEUE: reject: RCPT from .*?: (.*?); from=<(.*?)> to=<(.*?)>", log)
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if m:
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message, sender, recipient = m.groups()
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if recipient in collector["real_mail_addresses"]:
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# only log mail to real recipients
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collector["rejected-mail"].setdefault(recipient, []).append( (date, sender, message) )
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if __name__ == "__main__":
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from status_checks import ConsoleOutput
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env = utils.load_environment()
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scan_mail_log(ConsoleOutput(), env)
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