Re: Postfix 20 years ago

On 02/12/2017 07:06 PM, Wietse Venema wrote: Last month it was 20 years ago that I started writing Postfix code. After coming to IBM research in November 1996, I spent most of December and January making notes on paper. I knew that writing a mail system was more work than any of my prior projects

Re: Blocking zip attachments if filesize smaller than xx kbytes

On 02/01/2014 05:09 AM, Noel Jones wrote: On 1/31/2014 5:38 PM, Thijssen wrote: Has someone already done this using header_checks? If so, please post the example you use. I'm getting fed up with those sneaky bastards trying to convince my parents to click on their attachments. But still need to

Re: Milters and Aliasing

Envoyé de ma machine à écrire. --- Spam : Classement statistique de messages électroniques - Une approche pragmatique Chez Amazon.fr : http://amzn.to/LEscRu ou http://bit.ly/SpamJM ------------

Re: avoiding overload on port 587

Stan Hoeppner wrote: On 11/30/2012 4:48 PM, Reindl Harald wrote: in the real world submission is useless if IMAP is down because the client will fail to store in "sent messages" In the real world most road warriors use POP, not IMAP, and those with consistent connectivity that do make use of

Re: Bulk Mailing Performance

DTNX Postmaster wrote: They aren't my perfect world criteria, but a direct quote from Sam Jones' earlier buzzword compliant reply. It was meant to illustrate the often ridiculous nature of vendor benchmarks, how useless they are in real world situations, and therefore how silly it is to pick s

Re: adding a header via milter

Viktor Dukhovni wrote: On Fri, May 18, 2012 at 10:11:10AM -0400, Ben Rosengart wrote: ... 2. I never liked milters (multi-threading complexity, and poor degradation when CPU is scarce under high load). Take a look at libmilter with a pool of workers. It's a FFR : _FFR_WORKERS_POOL

Re: postfix as incoming relay to protect exchange server /recipient lookup

Stan Hoeppner wrote: Jose-Marcio Martins da Cruz put forth on 12/2/2010 2:40 AM: Victor Duchovni wrote: On Wed, Dec 01, 2010 at 11:43:30PM -0600, Stan Hoeppner wrote: The lookup is always a cache miss. Then an SMTP probe is sent. Dictionary attacks always yield cache misses. You are forgetting

Re: postfix as incoming relay to protect exchange server /recipient lookup

Victor Duchovni wrote: On Wed, Dec 01, 2010 at 11:43:30PM -0600, Stan Hoeppner wrote: The lookup is always a cache miss. Then an SMTP probe is sent. Dictionary attacks always yield cache misses. You are forgetting that dictionary attacks are almost exclusively queries for non-existent users

Re: Does postfix support POP3 & anyone used Cerberus Helpdesk with Postfix

sunhux G wrote: Will the messages still be located on the Exch server after POP3 is disabled? No, there's no messages stored on the Exch server : in fact currently the Cerberus Hdesk software will connect up to the Exch server quite frequently (I'm not sure how frequent) such that any email

Re: couple of doubts about postfix milters

Victor Duchovni wrote: However, I don't know if postfix checks smtpd_recipient_restrictions before calling milters or after. I suppose before, but I'm not sure. Wietse ??? The "RCPT TO" command is passed to the milter after Postfix restriction processing. Even rejected commands are are passed

Re: couple of doubts about postfix milters

Noel Jones wrote: On 11/9/2010 8:39 AM, Lima Union wrote: clamav-milter operates on the message data, so all postfix smtpd_*_restrictions -- which operate on the envelope -- will get a chance to reject mail before the data is transmitted. sid-milter operates on the envelope. It will prob

Re: Milter by domain

Noel Jones wrote: On 1/28/2010 1:46 AM, Jonathan Cutting wrote: I guess some sort of domain:port_number mapping would suffice. Is this possible using milters or might it be easier to use a custom script? A single milter that handles all domains is what you need. Or maybe a "master" milter

Re: How to not reject valid MTAs for inconsistent forward/reverse DNS.

LuKreme wrote: On Jan 17, 2010, at 17:27, Stan Hoeppner wrote: Then I'd surmise your experience is very limited. I have only been running a mailserver for 17 years or so. Almost the same... >> Join spam-l and ask this >> naked PTR question. You will be clued. What is their authority ? Wh

Re: How to not reject valid MTAs for inconsistent forward/reverse DNS.

Daniel V. Reinhardt wrote: JM, There are various online tutorials that describe how to setup a proper name server, and how to administer one. If they are unable to teach themselves, then they should get rejected till they become better educated in the practices of Information Technology and

Re: How to not reject valid MTAs for inconsistent forward/reverse DNS.

Stan Hoeppner wrote: Rejecting mail due to lack of a PTR is an anti bot spam tactic. It is as prevalent today as it was 5 years ago, but probably less effective. Many ISPs went PTR crazy, assigning them to all their dynamic consumer IP ranges. DULs and generic PTR regexes are now more effecti

Re: 3000 recipients

richard lucassen wrote: On Sun, 3 Jan 2010 14:28:11 -0600 Kenneth Marshall wrote: [mlm] I will second that using a real MLM is usually a much, much better option that will allow you to prevent collateral damage to your mail reputation when there is a delivery problem. For example, when using

Re: always get 450 for non-existent domain

D G Teed wrote: On Fri, Dec 18, 2009 at 7:52 PM, Wietse Venema > wrote: Due to the hardwired default of 450, all sent mail becomes sluggish on the Exchange queue as hundreds of messages are retried every few minutes (one mistyped domain in a mail list triggers this

Re: Confirmation email with captcha

Hello, M. Fioretti wrote: On Wed, Jun 10, 2009 09:24:09 AM +0200, Gabriel Hahmann wrote: Good morning, ... if you aren't convinced yet, there is also http://www.cl.cam.ac.uk/~rnc1/cr/index.html If you're still not yet convinced, take a look at w3.org opinion : http://www.w3.org

Re: SMFIP_RCPT_REJ Milter support

mental release postfix-2.7-20090426. Wietse -- --------------- Jose Marcio MARTINS DA CRUZ http://j-chkmail.ensmp.fr Ecole des Mines de Paris 60, bd Saint Michel 75272 - PARIS CEDEX 06 mailto:jose-marcio.mart...@mines-paristech.fr

Re: RBL

Joey wrote: Hello All, Does anyone have a good reference of how to create my own RBL so I can load IP’s into it and check against it from postfix? This is a simple script which converts a text file with a list of IP addresses into a bind zone http://j-chkmail.ensmp.fr/tools/mk_dns

Re: Use a recipients_map for spamassassin

recipients : some of them want the message scanned, and some other don't. * A message sent to an alias resolving to many recipients. Same situation : some want the message scanned - but not all. -- ------- Jose Marcio MARTINS DA CRUZ