[pfx] Re: postscreen question
On Wed, 26 Apr 2023 at 18:47, Wietse Venema via Postfix-users < postfix-users@postfix.org> wrote: > Don't do it unless you aree willing to suffer some pain. The mere > fast that a button exists does not impy that everyone must use it. > > Dear Wietse, Could you please give me some examples where you think it will cause the most pain ? Thanks, Mitya ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] postconf -M foo/unix='foo unix ...' get segfault if multiple entries exist in master.cf
I see the following problems. 1. `postconf -M bar/unix='foo unix ...'` will duplicates entries in master.cf. 2. `postconf -M foo/unix='foo unix ...' get segfault if multiple entries exist in master.cf. ``` # postconf mail_version mail_version = 3.7.4 # postconf -M foo/unix='foo unix - n n - - pipe argv=/bin/false' # tail /etc/postfix/master.cf ... foounix - n n - - pipe argv=/bin/false # postconf -M bar/unix='foo unix - n n - - pipe argv=/bin/false' # tail /etc/postfix/master.cf ... foounix - n n - - pipe argv=/bin/false foounix - n n - - pipe argv=/bin/false # postconf -M foo/unix='foo unix - n n - - pipe argv=/bin/false' Segmentation fault ``` -- -- Name: SATOH Fumiyasu @ OSSTech Corp., Japan (fumiyas @ osstech co jp) -- Business Home: https://www.OSSTech.co.jp/ -- GitHub Home: https://GitHub.com/fumiyas/ -- PGP Fingerprint: BBE1 A1C9 525A 292E 6729 CDEC ADC2 9DCA 5E1C CBCA ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: postscreen question
Using rspamd instead of postscreen? > > Dear All, > > I am building a new server where I would like to build the best spam filter > possible :) > I am checking postscreen these days. I am planning to turn on the "deep > tests" as well, but it seems to be really scary to me :) > > In the doc they say that I can have 2 IPs and set up a secondary MX record > and usually the sender will immediately connect back from the same IP. > > How good idea is it to do this ? What happens if the sender has a really > big pool of IPs and they will not use the same IP when reconnect to the 2nd > MX ? Theoretically it means that that sender will never be able to send > mail to us right ? > > What is the best practice here ? I am curious for your opinions. > > Thanks, > Mitya > > ___ > Postfix-users mailing list -- postfix-users@postfix.org > To unsubscribe send an email to postfix-users-le...@postfix.org > -- https://kenpeng.pages.dev/ ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: postscreen question
On 2023-04-26 at 11:56:01 UTC-0400 (Wed, 26 Apr 2023 17:56:01 +0200) Mihaly Zachar via Postfix-users is rumored to have said: Dear All, I am building a new server where I would like to build the best spam filter possible :) I am checking postscreen these days. I am planning to turn on the "deep tests" as well, but it seems to be really scary to me :) Don't. They are not worth it. What is the best practice here ? I am curious for your opinions. Only use Postscreen's before-greeting tests. The "deep" tests add very little marginal value. -- Bill Cole b...@scconsult.com or billc...@apache.org (AKA @grumpybozo and many *@billmail.scconsult.com addresses) Not Currently Available For Hire ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: follow-up: Re: regression: cleanup crashes if fullname contains only whitespace(s) . fixed?
This was fixed almost 2 years ago in postfix-3.3.19, postfix-3.4.22, postfix-3.5.12, postfix-3.6.3. thx. dropped from Fedora v3.0.8 pkgs: https://src.fedoraproject.org/rpms/postfix/blob/rawhide/f/postfix.spec#_807 ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: postscreen question
Mihaly Zachar via Postfix-users: > Dear All, > > I am building a new server where I would like to build the best spam filter > possible :) > I am checking postscreen these days. I am planning to turn on the "deep > tests" as well, but it seems to be really scary to me :) Don't do it unless you aree willing to suffer some pain. The mere fast that a button exists does not impy that everyone must use it. Wietse ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: follow-up: Re: regression: cleanup crashes if fullname contains only whitespace(s) . fixed?
PGNet Dev via Postfix-users: > fedora 38/rhel pkg builds carry a few patches > > i'm trying to figure out what still needs to be carried > > one was reported @ distro > > Bug 1977732 - [Regression] postfix "cleanup" crashes when processing > messages containing a "whitespace-only" fullname >https://bugzilla.redhat.com/show_bug.cgi?id=1977732 This was fixed almost 2 years ago in postfix-3.3.19, postfix-3.4.22, postfix-3.5.12, postfix-3.6.3. Wiietse ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] postscreen question
Dear All, I am building a new server where I would like to build the best spam filter possible :) I am checking postscreen these days. I am planning to turn on the "deep tests" as well, but it seems to be really scary to me :) In the doc they say that I can have 2 IPs and set up a secondary MX record and usually the sender will immediately connect back from the same IP. How good idea is it to do this ? What happens if the sender has a really big pool of IPs and they will not use the same IP when reconnect to the 2nd MX ? Theoretically it means that that sender will never be able to send mail to us right ? What is the best practice here ? I am curious for your opinions. Thanks, Mitya ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] follow-up: Re: regression: cleanup crashes if fullname contains only whitespace(s) . fixed?
fedora 38/rhel pkg builds carry a few patches i'm trying to figure out what still needs to be carried one was reported @ distro Bug 1977732 - [Regression] postfix "cleanup" crashes when processing messages containing a "whitespace-only" fullname https://bugzilla.redhat.com/show_bug.cgi?id=1977732 then sent to list here, and ACK'd https://marc.info/?l=postfix-users&m=162531677406087&w=2 List: postfix-users Subject:Re: regression: cleanup crashes if fullname contains only whitespace(s) From: Wietse Venema Date: 2021-07-03 12:52:19 Message-ID: 4GHBg75XKrzJrNy () spike ! porcupine ! org checking src @ https://github.com/vdukhovni/postfix/blob/master/postfix/src/cleanup/cleanup_message.c#L773 the provided workaround patch https://bugzilla-attachments.redhat.com/attachment.cgi?id=1797493 wasn't adopted as-is. checking logs/HISTORY, not clear to me that it was dealt with. *WAS* is fixed otherwise ? ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: Subject modification based on recipient
Wietse Venema via Postfix-users: > Andreas Cieslak via Postfix-users: > > Hi list, > > > > i want to achieve that my postfix relay will modify the subject based on > > the recipients. > > The postfiy relay is receiving email from other internal systems and > > forwards all mail to a mail group (testgroup) on another internal mail > > system. > > Suggestion: use milter-regex. You can install it from source code, > or install as a package for many distributions. Unfortunately, it looks like milter-regex is good for rejecting mail, not for message modification. Wietse ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: Subject modification based on recipient
Andreas Cieslak via Postfix-users: > Hi list, > > i want to achieve that my postfix relay will modify the subject based on > the recipients. > The postfiy relay is receiving email from other internal systems and > forwards all mail to a mail group (testgroup) on another internal mail > system. Suggestion: use milter-regex. You can install it from source code, or install as a package for many distributions. Wietse ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: Subject modification based on recipient
On 2023-04-26 at 10:07:09 UTC-0400 (Wed, 26 Apr 2023 16:07:09 +0200) Andreas Cieslak via Postfix-users is rumored to have said: Hi list, i want to achieve that my postfix relay will modify the subject based on the recipients. The postfiy relay is receiving email from other internal systems and forwards all mail to a mail group (testgroup) on another internal mail system. I have already configured the following in the header_checks file if !/^To: email@company$/ /^Subject: (.+)$/i REPLACE Subject: [email@company] $1 endif For this one case it works fine. Now i want to modify the subject for more emails in the header_checks like if !/^To: email@company$/ /^Subject: (.+)$/i REPLACE Subject: [email@company] $1 endif if !/^To: email@company2$/ /^Subject: (.+)$/i REPLACE Subject: [email@company2] $1 endif I have read that there is a header_checks limitation for the first line check, so my example does not work. Correct. The header_checks facility checks exactly one header at a time, so there is NO WAY to make the above logic work using header_checks. When header_checks is examining the To header, it is ONLY able to operate on the To header. The 'if/endif' structure is primarily useful to make sure some rules are only ever applied to specific headers and skipped for others. Does anybody know if its possible with regex within header_checks? Or is there another possibility to solve this? You would need to use a milter or a content_filter for this. For example, MIMEDefang (or its descendant MailMunge) could do this in a filter_end() subroutine. -- Bill Cole b...@scconsult.com or billc...@apache.org (AKA @grumpybozo and many *@billmail.scconsult.com addresses) Not Currently Available For Hire ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Subject modification based on recipient
Hi list, i want to achieve that my postfix relay will modify the subject based on the recipients. The postfiy relay is receiving email from other internal systems and forwards all mail to a mail group (testgroup) on another internal mail system. I have already configured the following in the header_checks file if !/^To: email@company$/ /^Subject: (.+)$/i REPLACE Subject: [email@company] $1 endif For this one case it works fine. Now i want to modify the subject for more emails in the header_checks like if !/^To: email@company$/ /^Subject: (.+)$/i REPLACE Subject: [email@company] $1 endif if !/^To: email@company2$/ /^Subject: (.+)$/i REPLACE Subject: [email@company2] $1 endif I have read that there is a header_checks limitation for the first line check, so my example does not work. Does anybody know if its possible with regex within header_checks? Or is there another possibility to solve this? Any hints would be appreciated. Thank you. Andreas ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: qmgr tuning
Gino Ferguson via Postfix-users: > Hi, > > > > I'm wondering why is the qmgr process count set to 1 by default in master.cf Because there MUST be only one scheduler. > Does it make any sense to increase this number to 2 or 5 or 10? > There are a couple of million emails are going through our servers > per day and there is a plenty of free CPU and RAM which could be > used. If you want to use more resourcs for email delivery, use more *delivery agent* proesses. Howevever, millions/day is nothing to worry about, even a Raspberri Pi could do that. > Also I'm wondering if it would help to speed up the delivery of > the new emails if there are higher number of delayed, older mails > in the queue. That's how it already works. See maximal_backoff_time and minimal_backoff_time. Wietse ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] qmgr tuning
Hi, I'm wondering why is the qmgr process count set to 1 by default in master.cf Does it make any sense to increase this number to 2 or 5 or 10? There are a couple of million emails are going through our servers per day and there is a plenty of free CPU and RAM which could be used. Also I'm wondering if it would help to speed up the delivery of the new emails if there are higher number of delayed, older mails in the queue. Cheers, G. ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: postfix mail server qmgr log entry query
On 26.04.23 05:48, Jitendra Chaudhari via Postfix-users wrote: The strange thing that is observed in the log is no-reply=19=tjsb@xxx.co.in The user email id at the email server is tjsb@xxx.co.in so my worry is what is the " no-reply=19=" string getting appended before the user email id "tjsb@xxx.co.in" i think it's a thing called VERP: https://en.wikipedia.org/wiki/Variable_envelope_return_path Is this a postfix qmgr process that is adding this string? And I can see many such entries in /var/maillog particularly for postfix/qmgr process with the random number getting appended as "no-reply=XX="user email address I don't think so. It's probably icewarp adding this. -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. REALITY.SYS corrupted. Press any key to reboot Universe. ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
