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6208fd26 | 1 | #!/usr/bin/env python |
58e64caf AA |
2 | # -*- coding: utf-8 -*- |
3 | #*************************************************************************** | |
ba6ae046 | 4 | #* Copyright (C) 2003-2013 Polytechnique.org * |
58e64caf AA |
5 | #* http://opensource.polytechnique.org/ * |
6 | #* * | |
7 | #* This program is free software; you can redistribute it and/or modify * | |
8 | #* it under the terms of the GNU General Public License as published by * | |
9 | #* the Free Software Foundation; either version 2 of the License, or * | |
10 | #* (at your option) any later version. * | |
11 | #* * | |
12 | #* This program is distributed in the hope that it will be useful, * | |
13 | #* but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
14 | #* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
15 | #* GNU General Public License for more details. * | |
16 | #* * | |
17 | #* You should have received a copy of the GNU General Public License * | |
18 | #* along with this program; if not, write to the Free Software * | |
19 | #* Foundation, Inc., * | |
20 | #* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * | |
21 | #*************************************************************************** | |
22 | ||
58e64caf AA |
23 | """ |
24 | Process as automatically as possible bounces from the newsletter | |
25 | ||
26 | The goal is to extract the email adresses that actually bounced. | |
27 | Bounces conforming to RFC 1894 will be automatically processed. | |
28 | ||
29 | This script uses the X-Spam-Flag header to remove spam and heuristics | |
30 | to detect out-of-office auto-replies and delivery status notifications. | |
31 | ||
32 | All emails are saved in different mailboxes to make human post-processing easier. | |
33 | """ | |
34 | ||
6208fd26 NI |
35 | import email |
36 | import mailbox | |
37 | import os | |
38 | import re | |
39 | import sys | |
40 | import time | |
58e64caf AA |
41 | |
42 | #----------------------------------------------------------------------------# | |
43 | ||
44 | class MboxProcessor: | |
45 | """Applies a series of filters to each message in a mbox.""" | |
46 | ||
47 | def __init__(self, mbox): | |
48 | self.mbox_file = mbox | |
49 | self.mbox = mailbox.mbox(self.mbox_file) | |
50 | self.filters = [ | |
51 | DirectBouncesFilter(), | |
52 | SpamFilter(), | |
53 | UnsureFilter(), | |
54 | CheckNonSpamFilter(), | |
55 | OutOfOfficeFilter(), | |
56 | DeliveryStatusNotificationFilter(), | |
57 | CatchAllFilter() | |
58 | ] | |
59 | ||
60 | def initialize_filters(self): | |
61 | for f in self.filters: f.initialize(self.mbox_file) | |
62 | self.start_time = time.clock() | |
63 | ||
64 | def apply_filters(self, message): | |
65 | return any(f.process(message) for f in self.filters) | |
66 | ||
67 | def finalize_filters(self): | |
68 | duration = time.clock() - self.start_time | |
69 | separator = '-' * 80 | |
6208fd26 NI |
70 | print(separator) |
71 | print('Processed the %d messages of %s in %.2fs' % (len(self.mbox), self.mbox_file, duration)) | |
72 | print(separator) | |
58e64caf | 73 | for f in self.filters: |
6208fd26 NI |
74 | f.finalize() |
75 | print(separator) | |
58e64caf AA |
76 | |
77 | def run(self): | |
78 | self.mbox.lock() | |
79 | try: | |
80 | self.initialize_filters() | |
81 | for message in self.mbox: self.apply_filters(message) | |
82 | self.finalize_filters() | |
83 | finally: | |
84 | self.mbox.unlock() | |
85 | self.mbox.close() | |
86 | ||
87 | #----------------------------------------------------------------------------# | |
88 | ||
89 | class MboxFilter: | |
90 | """Defines an interface for filters.""" | |
91 | ||
92 | def initialize(self, mbox_file): | |
93 | """Called by the processor before processing starts. | |
6208fd26 | 94 | |
58e64caf AA |
95 | This is the place to open descriptors required during processing.""" |
96 | pass | |
97 | ||
98 | def process(self, message): | |
99 | """Called by the processor for each message that reaches this step. | |
6208fd26 | 100 | |
58e64caf AA |
101 | Return true to stop processing, and false to go to the next filter.""" |
102 | pass | |
103 | ||
104 | def finalize(self): | |
105 | """Called by the processor after processing ends. | |
6208fd26 | 106 | |
58e64caf AA |
107 | This is the place to display the results and close all descriptors.""" |
108 | pass | |
109 | ||
110 | #----------------------------------------------------------------------------# | |
111 | ||
112 | def findSubject(message): | |
113 | """Returns the subject of an email.Message as an unicode string.""" | |
6208fd26 NI |
114 | if message['Subject'] is None: |
115 | return None | |
116 | ||
117 | # decode_header returns a list of (decoded_string, charset) pairs | |
118 | decoded_seq = email.header.decode_header(message['Subject']) | |
119 | decoded_seq = [(subj, enc or 'utf-8') for subj, enc in decoded_seq] | |
120 | header = email.header.make_header(decoded_seq) | |
121 | # Be Python 2 & 3 compatible | |
122 | return unicode(header) if sys.version_info < (3,) else str(header) | |
123 | ||
58e64caf AA |
124 | |
125 | _recipient_re = re.compile(r'^rfc822; ?(.+)$', re.I | re.U) | |
8c9c7d77 NI |
126 | # Some MTA set the Final-Recipient with "LOCAL;" instead of "rfc822;" |
127 | _recipient_re2 = re.compile(r'^local; ?(.+)$', re.I | re.U) | |
58e64caf | 128 | |
6208fd26 | 129 | |
58e64caf AA |
130 | def findAddressInBounce(bounce): |
131 | """Finds the faulty email address in a bounced email. | |
6208fd26 | 132 | |
58e64caf AA |
133 | See RFC 1894 for more information. |
134 | Returns None or the email address.""" | |
6208fd26 | 135 | |
58e64caf AA |
136 | # Check that it is a bounce - a few MTA fail to set this correctly :( |
137 | if bounce.get_content_type() != 'multipart/report': | |
6208fd26 | 138 | print('! Not a valid bounce (expected multipart/report, found %s).' % bounce.get_content_type()) |
58e64caf AA |
139 | return None |
140 | # Extract the second component of the multipart/report | |
aa6c6ed4 AA |
141 | num_payloads = len(bounce.get_payload()) |
142 | if num_payloads < 2: | |
6208fd26 | 143 | print('! Not a valid bounce (expected at least 2 parts, found %d).' % num_payloads) |
58e64caf AA |
144 | return None |
145 | status = bounce.get_payload(1) | |
146 | if status.get_content_type() != 'message/delivery-status': | |
4aad6c9c | 147 | print('! Not a valid bounce (expected message/delivery-status, found %s).' % status.get_content_type()) |
58e64caf AA |
148 | return None |
149 | # The per-message-fields don't matter here, get only the per-recipient-fields | |
aa6c6ed4 AA |
150 | num_payloads = len(status.get_payload()) |
151 | if num_payloads < 2: | |
6208fd26 | 152 | print('! Not a valid bounce (expected at least 2 parts, found %d).' % num_payloads) |
58e64caf AA |
153 | return None |
154 | content = status.get_payload(1) | |
155 | if content.get_content_type() != 'text/plain': | |
4aad6c9c | 156 | print('! Not a valid bounce (expected text/plain, found %s).' % content.get_content_type()) |
58e64caf AA |
157 | return None |
158 | # Extract the faulty email address | |
159 | recipient_match = _recipient_re.search(content['Final-Recipient']) | |
160 | if recipient_match is None: | |
8c9c7d77 NI |
161 | # Be nice, test another regexp |
162 | recipient_match = _recipient_re2.search(content['Final-Recipient']) | |
163 | if recipient_match is None: | |
164 | print('! Missing final recipient.') | |
165 | return None | |
58e64caf AA |
166 | email = recipient_match.group(1) |
167 | # Check the action field | |
4aad6c9c | 168 | if content['Action'].lower() != 'failed': |
6208fd26 | 169 | print('! Not a failed action (%s).' % content['Action']) |
58e64caf | 170 | return None |
29c6ffa5 NI |
171 | |
172 | status = content['Status'] | |
173 | diag_code = content['Diagnostic-Code'] | |
174 | ||
175 | # Permanent failure state | |
176 | if int(status[:1]) == 5: | |
177 | return email | |
178 | ||
58e64caf | 179 | # Mail forwarding loops, DNS errors and connection timeouts cause X-Postfix errors |
29c6ffa5 NI |
180 | if diag_code is not None and diag_code.startswith('X-Postfix'): |
181 | return email | |
182 | ||
183 | failure_hints = [ | |
184 | "insufficient system storage", | |
185 | "mailbox full", | |
186 | "user unknown", | |
187 | ] | |
188 | if 'quota' in status.lower(): | |
189 | return email | |
190 | if diag_code is not None: | |
191 | ldiag_code = diag_code.lower() | |
192 | if any(hint in ldiag_code for hint in failure_hints): | |
193 | return email | |
194 | ||
195 | print('! Not a permanent failure status (%s).' % status) | |
196 | if diag_code is not None: | |
197 | print('! Diagnostic code was: %s' % diag_code) | |
198 | return None | |
58e64caf | 199 | |
15f4834d NI |
200 | |
201 | def findAddressInPlainBounce(bounce): | |
202 | """Finds the faulty email address in a non-RFC-1894 bounced email | |
203 | """ | |
204 | if 'MAILER-DAEMON@' not in bounce['From'].upper(): | |
205 | print('! Not a valid plain bounce (expected from MAILER-DAEMON, found %s).' % bounce['From']) | |
206 | return None | |
207 | if bounce.get_content_type() != 'text/plain': | |
208 | print('! Not a valid plain bounce (expected text/plain, found %s).' % bounce.get_content_type()) | |
209 | return None | |
210 | subject = findSubject(bounce).lower() | |
211 | if (subject != 'failure notice' | |
212 | and subject != 'undeliverable message' | |
213 | and not subject.startswith('mail delivery failed') | |
214 | and subject != 'delivery status notification (failure)'): | |
215 | ||
216 | print('! Not a valid plain bounce (unknown subject: %s).' % subject) | |
217 | return None | |
218 | ||
219 | # Read the 15 first lines of content and find some relevant keywords to validate the bounce | |
220 | lines = bounce.get_payload().splitlines()[:15] | |
221 | ||
222 | # Match: | |
223 | # A message that you sent could not be delivered to one or more of its recipients. | |
224 | # I'm afraid I wasn't able to deliver your message to the following addresses. | |
225 | # The following message to <email@example.com> was undeliverable. | |
226 | non_delivery_hints = [ | |
227 | "Delivery to the following recipient failed permanently", | |
228 | "I wasn't able to deliver your message", | |
229 | "> was undeliverable.", | |
230 | "could not be delivered to", | |
231 | "we were unable to deliver your message", | |
232 | ] | |
233 | if not any(any(hint in line for hint in non_delivery_hints) for line in lines): | |
234 | print('! Unknown mailer-daemon message, unable to find an hint for non-delivery in message:') | |
235 | print('\n'.join(lines)) | |
236 | return None | |
237 | ||
238 | # Match: | |
239 | # This is a permanent error; I've given up. Sorry it didn't work out. | |
240 | # 5.1.0 - Unknown address error 550-'email@example.com... No such user' | |
241 | permanent_error_hints = [ | |
242 | "Delivery to the following recipient failed permanently", | |
243 | "This is a permanent error", | |
244 | "Unknown address error", | |
245 | "550 Requested action not taken", | |
246 | ] | |
247 | if not any(any(hint in line for hint in permanent_error_hints) for line in lines): | |
248 | print('! Unknown mailer-daemon message, unable to find an hint for permanent error in message:') | |
249 | print('\n'.join(lines)) | |
250 | return None | |
251 | ||
252 | # Retrieve the first occurence of <email@example.com> | |
253 | for line in lines: | |
254 | match = re.match(r'.*?<([0-9a-zA-Z_.-]+@[0-9a-zA-Z_.-]+)>', line) | |
255 | if match is None: | |
256 | match = re.match(r'^\s*([0-9a-zA-Z_.-]+@[0-9a-zA-Z_.-]+)\s*$', line) | |
257 | if match is not None: | |
258 | email = match.group(1) | |
259 | if email.endswith('@polytechnique.org'): | |
260 | # First valid mail is something like <info_newsletter@polytechnique.org>, so we missed the real one | |
261 | break | |
262 | return email | |
263 | ||
264 | print('! Unknown mailer-daemon message, unable to find email address:') | |
265 | print('\n'.join(lines)) | |
266 | return None | |
267 | ||
58e64caf AA |
268 | #----------------------------------------------------------------------------# |
269 | ||
270 | class DirectBouncesFilter(MboxFilter): | |
271 | ||
272 | def initialize(self, mbox_file): | |
273 | self.seen = 0 | |
6208fd26 | 274 | self.bad_problems = 0 |
58e64caf AA |
275 | self.emails = [] |
276 | self.mbox_file = '%s.bounced' % mbox_file | |
277 | self.mbox = mailbox.mbox(self.mbox_file) | |
278 | self.mbox.clear() | |
279 | ||
280 | def process(self, message): | |
281 | if message['X-Spam-Flag'] is None: | |
282 | # During finalization, we will verifiy that all messages were processed | |
283 | self.seen += 1 | |
e0c82ac8 AA |
284 | # Special case: ignore mailman notifications for the mailing-list |
285 | # on which the NL is forwarded | |
6208fd26 NI |
286 | if message['From'] == 'newsletter-externes-bounces@polytechnique.org': |
287 | print('! Dropping a notification from mailman for newsletter-externes@polytechnique.org, this should be OK.') | |
e0c82ac8 AA |
288 | self.seen -= 1 |
289 | return True | |
58e64caf | 290 | # Additionnal checks, just to be sure |
e0c82ac8 | 291 | elif message['From'] != 'MAILER-DAEMON@polytechnique.org (Mail Delivery System)' \ |
58e64caf | 292 | or message['Subject'] != 'Undelivered Mail Returned to Sender': |
6208fd26 | 293 | print('! Not an usual direct bounce (From="%s", Subject="%s").' % (message['From'], message['Subject'])) |
e0c82ac8 AA |
294 | else: |
295 | email = findAddressInBounce(message) | |
296 | if email is not None: | |
297 | self.emails.append(email) | |
298 | self.mbox.add(message) | |
299 | return True | |
300 | else: | |
6208fd26 NI |
301 | print('! => No email found in direct bounce, this is really bad.') |
302 | self.bad_problems += 1 | |
58e64caf AA |
303 | return False |
304 | ||
305 | def finalize(self): | |
6208fd26 NI |
306 | print('Found %d messages with no X-Spam-Flag header.' % self.seen) |
307 | print('Found %d of them that are confirmed bounces.' % len(self.mbox)) | |
308 | print('They were saved in %s.' % self.mbox_file) | |
309 | if self.bad_problems: | |
310 | print('Found %d of them that are invalid.' % self.bad_problems) | |
311 | if self.seen != len(self.mbox) + self.bad_problems: | |
312 | print(' /!\ These numbers shoud be equal! We have a problem! /!\\') | |
313 | print('') | |
314 | print('Here is the list of email adresses for these bounces:') | |
315 | print('') | |
58e64caf | 316 | for email in self.emails: |
6208fd26 NI |
317 | print(email) |
318 | print('') | |
58e64caf AA |
319 | self.mbox.close() |
320 | ||
321 | #----------------------------------------------------------------------------# | |
322 | ||
323 | class SpamFilter(MboxFilter): | |
324 | ||
325 | def initialize(self, mbox_file): | |
326 | self.mbox_file = '%s.spam' % mbox_file | |
327 | self.mbox = mailbox.mbox(self.mbox_file) | |
328 | self.mbox.clear() | |
329 | ||
330 | def process(self, message): | |
e0c82ac8 AA |
331 | if message['X-Spam-Flag'] is not None \ |
332 | and message['X-Spam-Flag'].startswith('Yes, tests=bogofilter'): | |
58e64caf AA |
333 | self.mbox.add(message) |
334 | return True | |
335 | return False | |
336 | ||
337 | def finalize(self): | |
6208fd26 NI |
338 | print('Found %d spams. This is reliable.' % len(self.mbox)) |
339 | print('They were saved in %s.' % self.mbox_file) | |
340 | print('You might check the contents of this mbox.') | |
58e64caf AA |
341 | self.mbox.close() |
342 | ||
343 | #----------------------------------------------------------------------------# | |
344 | ||
345 | class UnsureFilter(MboxFilter): | |
346 | ||
347 | def initialize(self, mbox_file): | |
348 | self.mbox_file = '%s.unsure' % mbox_file | |
349 | self.mbox = mailbox.mbox(self.mbox_file) | |
350 | self.mbox.clear() | |
351 | ||
352 | def process(self, message): | |
e0c82ac8 AA |
353 | if message['X-Spam-Flag'] is not None \ |
354 | and message['X-Spam-Flag'].startswith('Unsure, tests=bogofilter'): | |
58e64caf AA |
355 | self.mbox.add(message) |
356 | return True | |
357 | return False | |
358 | ||
359 | def finalize(self): | |
6208fd26 NI |
360 | print('Found %d unclassified messages. Most of them should be spams.' % len(self.mbox)) |
361 | print('They were saved in %s.' % self.mbox_file) | |
362 | print('You must check the contents of this mbox and feed the antispam.') | |
58e64caf AA |
363 | self.mbox.close() |
364 | ||
365 | #----------------------------------------------------------------------------# | |
366 | ||
367 | class CheckNonSpamFilter(MboxFilter): | |
368 | ||
369 | def initialize(self, mbox_file): | |
370 | self.seen = 0 | |
371 | ||
372 | def process(self, message): | |
e0c82ac8 AA |
373 | if message['X-Spam-Flag'] is None \ |
374 | or not message['X-Spam-Flag'].startswith('No, tests=bogofilter'): | |
58e64caf AA |
375 | self.seen += 1 |
376 | return False | |
377 | ||
378 | def finalize(self): | |
379 | if self.seen > 0: | |
6208fd26 NI |
380 | print('Encountered %d messages that were neither spam, nor unsure, nor non-spams.' % self.seen) |
381 | print('Please investigate.') | |
58e64caf | 382 | else: |
6208fd26 | 383 | print('All messages were either spam, or unsure, or non-spams. Good.') |
58e64caf AA |
384 | |
385 | #----------------------------------------------------------------------------# | |
386 | ||
387 | class OutOfOfficeFilter(MboxFilter): | |
388 | ||
389 | def initialize(self, mbox_file): | |
390 | self.mbox_file = '%s.ooo' % mbox_file | |
391 | self.mbox = mailbox.mbox(self.mbox_file) | |
392 | self.mbox.clear() | |
393 | subject_re = [ | |
394 | r'^Absen(t|ce)', | |
6208fd26 | 395 | r'^(AUTO: )?Out of (the )?office', |
fc643049 | 396 | r'^Auto( ?): ', |
6208fd26 | 397 | r'^Automatic reply: ', |
aa6c6ed4 | 398 | r'automatique d\'absence', |
aa6c6ed4 | 399 | r'AutoReply', |
6208fd26 NI |
400 | r'(est|is) absent', |
401 | r'I am out of town', | |
402 | r'I am currently away', | |
fc643049 | 403 | r'(am|is) out of (the )?office', |
6208fd26 NI |
404 | r'Notification d\'absence', |
405 | r'R.{1,2}ponse automatique( :)?', # There may be encoding error of e acute | |
58e64caf | 406 | ] |
6208fd26 | 407 | self.subject_regexes = [re.compile(sre, re.I | re.U) for sre in subject_re] |
58e64caf AA |
408 | |
409 | def process(self, message): | |
410 | subject = findSubject(message) | |
411 | if subject is not None and any(regex.search(subject) for regex in self.subject_regexes): | |
412 | self.mbox.add(message) | |
413 | return True | |
fc643049 NI |
414 | |
415 | # Some systems reply with "Re: ". Be smart here! | |
416 | if subject is not None and subject.startswith('Re: '): | |
417 | # Delivered-To: Autoresponder | |
418 | if 'Autoresponder' in message.get_all('Delivered-To'): | |
419 | self.mbox.add(message) | |
420 | return True | |
421 | # Parse content if it is simple enough | |
422 | if message.get_content_type() == 'text/plain': | |
423 | firstline = message.get_payload().splitlines()[0].lower() | |
424 | if (' absent du bureau ' in firstline | |
425 | or ' away from my office ' in firstline): | |
426 | self.mbox.add(message) | |
427 | return True | |
428 | ||
58e64caf AA |
429 | return False |
430 | ||
431 | def finalize(self): | |
6208fd26 NI |
432 | print('Found %d "out of office". This is generally reliable.' % len(self.mbox)) |
433 | print('They were saved in %s.' % self.mbox_file) | |
434 | print('You may check the contents of this mbox.') | |
58e64caf AA |
435 | self.mbox.close() |
436 | ||
437 | #----------------------------------------------------------------------------# | |
438 | ||
439 | class DeliveryStatusNotificationFilter(MboxFilter): | |
440 | ||
441 | def initialize(self, mbox_file): | |
442 | self.emails = [] | |
443 | self.mbox_file = '%s.dsn' % mbox_file | |
444 | self.mbox = mailbox.mbox(self.mbox_file) | |
445 | self.mbox.clear() | |
6208fd26 NI |
446 | self.mbox_temp_file = '%s.dsn-temp' % mbox_file |
447 | self.mbox_temp = mailbox.mbox(self.mbox_temp_file) | |
448 | self.mbox_temp.clear() | |
58e64caf AA |
449 | |
450 | def process(self, message): | |
15f4834d NI |
451 | # Don't modify message variable for "self.mbox.add(message)" |
452 | report_message = message | |
453 | # Find real report inside attachment | |
454 | if message.get_content_type() == 'multipart/mixed': | |
455 | report_message = message.get_payload(0) | |
456 | ||
457 | # Process report if its type is correct | |
458 | if report_message.get_content_type() == 'multipart/report': | |
459 | email = findAddressInBounce(report_message) | |
58e64caf AA |
460 | if email is not None: |
461 | self.emails.append(email) | |
462 | self.mbox.add(message) | |
6208fd26 NI |
463 | else: |
464 | print("! => Moved to temporary DSN mailbox") | |
465 | self.mbox_temp.add(message) | |
15f4834d NI |
466 | return True |
467 | ||
468 | # Detect ill-formatted reports, sent as plain text email | |
4cfc54b4 NI |
469 | if 'MAILER-DAEMON@' in message['From'].upper() and report_message.get_content_type() == 'text/plain': |
470 | email = findAddressInPlainBounce(report_message) | |
15f4834d NI |
471 | if email is not None: |
472 | self.emails.append(email) | |
473 | self.mbox.add(message) | |
6208fd26 | 474 | return True |
58e64caf AA |
475 | return False |
476 | ||
477 | def finalize(self): | |
6208fd26 NI |
478 | print('Found %d delivery status notifications. This is generally reliable.' % len(self.mbox)) |
479 | print('They were saved in %s.' % self.mbox_file) | |
480 | print('') | |
481 | print('Here is the list of email adresses for these bounces:') | |
482 | print('') | |
58e64caf | 483 | for email in self.emails: |
6208fd26 NI |
484 | print(email) |
485 | print('') | |
58e64caf | 486 | self.mbox.close() |
6208fd26 NI |
487 | print('Found %d temporary and invalid delivery status notifications.' % len(self.mbox_temp)) |
488 | print('They were saved in %s.' % self.mbox_temp_file) | |
489 | self.mbox_temp.close() | |
58e64caf AA |
490 | |
491 | #----------------------------------------------------------------------------# | |
492 | ||
493 | class CatchAllFilter(MboxFilter): | |
494 | ||
495 | def initialize(self, mbox_file): | |
496 | self.mbox_file = '%s.catchall' % mbox_file | |
497 | self.mbox = mailbox.mbox(self.mbox_file) | |
498 | self.mbox.clear() | |
499 | ||
500 | def process(self, message): | |
501 | self.mbox.add(message) | |
502 | return True | |
503 | ||
504 | def finalize(self): | |
505 | if len(self.mbox) > 0: | |
6208fd26 NI |
506 | print('%d messages reached the catchall.' % len(self.mbox)) |
507 | print('They were saved in %s.' % self.mbox_file) | |
508 | print('You must process the contents of this mbox manually.') | |
58e64caf AA |
509 | self.mbox.close() |
510 | else: | |
6208fd26 | 511 | print('No messages reached the catchall. Nice.') |
58e64caf AA |
512 | self.mbox.close() |
513 | os.unlink(self.mbox_file) | |
514 | ||
515 | #----------------------------------------------------------------------------# | |
516 | ||
517 | if __name__ == '__main__': | |
518 | ||
519 | if len(sys.argv) != 2: | |
6208fd26 | 520 | print('Usage: %s mbox' % sys.argv[0]) |
58e64caf AA |
521 | sys.exit(1) |
522 | ||
523 | if not os.path.exists(sys.argv[1]): | |
6208fd26 | 524 | print('No such file: %s' % sys.argv[1]) |
58e64caf AA |
525 | sys.exit(1) |
526 | ||
527 | processor = MboxProcessor(sys.argv[1]) | |
528 | processor.run() |