Multiple SMTP gateways in one MX record

Dear Colleagues, one of my team colleagues decided to configure multiple SMTP gateways for a single domain. domain.com MX 10 gate1-1.com 10 gate1-2.com 30 gate2-1.com 30 gate2-2.com 60 gate3-1.com 60 gate3-2.com Each SMTP gate belong to separate domain and its manage by separate team. domain.c

receiving message - checking mx record by postfix

Dear Colleagues, I would like to understand how Postfix receiving message. I expect that Postfix has been written base on the RFC rules so maybe somebody will be able to explain me how its working inside - how this system receiving message and what is going on in the background. Our consultant ha

Re: receiving message - checking mx record by postfix

: > Read : http://www.sorbs.net/faq/rfc_helo_enforcement.shtml > > I contains also the links to the RFC’s > > > > Greetz, > > > > Louis > > > > > > > -- > > *Van:* zalezny.niezale...@gmail.com [mailto: > owner-post

Re: receiving message - checking mx record by postfix

015 at 01:29:43PM +0100, Zalezny Niezalezny wrote: > > > I would like to understand how Postfix receiving message. I expect that > > Postfix has been written base on the RFC rules so maybe somebody will be > > able to explain me how its working inside - how this system receiving

Re: receiving message - checking mx record by postfix

thanks for Your support. On Tue, Nov 10, 2015 at 9:49 PM, Viktor Dukhovni wrote: > On Tue, Nov 10, 2015 at 09:29:19PM +0100, Zalezny Niezalezny wrote: > > > We have two systems which are dedicated only to send E-mails. Mostly for > > massmailing. These two machines will

Planning disk size/deffered queue for relay system base on Postfix

Hi, in my current infrastructure we have several Relay systems which are responsible for transferering message thru different subnets to the internet. At the moment our system sending aproximately ~30 000 E-mails per day, each E-mail is transfer thru few mail relay systems. Here You have some ex

Re: Planning disk size/deffered queue for relay system base on Postfix

Hi, thank You very much for Your support. Cheers Zalezny On Wed, Nov 25, 2015 at 12:22 PM, Wietse Venema wrote: > Zalezny Niezalezny: > > 1) what will happend with an E-mails if RELAY02 will not be available > for a > > few hours ? In my understanding Postfix will put

Domain MX record vs SMTP Loadbalancer

Hi, I have a question regarding Domain MX record and physical SMTP Loadbalancer. In my infrastructure we have several Postfix machines with local mailboxes. Each system sending messages to relay servers using internal relay domains with MX records. My team colleague told me that we will not use a

Re: Domain MX record vs SMTP Loadbalancer

Hi, thank You for Your feedback. Does this solution is also described by RFC ? I reviewed RFC but I see that SMTP loadbalancing should be done using DNS with proper setup MX records. With kind regards Zalezny On Fri, Nov 27, 2015 at 2:10 PM, Wietse Venema wrote: > Zalezny Niezale

Re: Domain MX record vs SMTP Loadbalancer

Thank You once again for Your support ! We can close that topic, I got all informations. I really appreciate that mailing list and people which doing support on it ! :) On Fri, Nov 27, 2015 at 3:48 PM, Wietse Venema wrote: > Zalezny Niezalezny: > > Hi, > > > > thank

relay not working - dns problem ?

Dear Colleagues, for some reason my relay sever is not able to relay messages to the next hoop. Maybe somebody would be able to support me here. In the Postfix Log I found this: Dec 8 13:47:15 ismtp01 mail.info: "postfix-outgoing-25"/smtp[5982]: 51808B1C: to=, relay=none, delay=0.03, delays=0.0

postfix and multiple TLS certificates

Hi, is it possible to configure in Postfix multiple TLS certificates. For example, on my LAN relay server I must configure TLS for the unix domains and for windows domains. Both domains use different names. How to manage that part ? How to generate certificates than ? Is it possible to map some h

Re: postfix and multiple TLS certificates

2.2015 09:11, Zalezny Niezalezny wrote: > > is it possible to configure in Postfix multiple TLS certificates. > > AFAIK, you can configure each smtp and smtpd instance with a certificate > of its own, so you could, for instance, have several smtpds listening on > different

sasl authentication - how to hash password maps

Dear Colleagues, I`m trying to establish TLS connection between our postfix MTA and Postfix relay server protected by password. At the moment my password map file looks like this. Plain text with domain, username and password. [root@server01 postfix]# cat sasl_passwd relay01.local test:testXX

filtering domains and e-mails - how ?

Hi All, by default in my Postfix configuration I`m routing all E-mails for the domain: *@domain.com to some external SMTP server. I configure it in the /etc/postfix/transport domain.com relay:[smtp.server.com] Now comes my question, how may I redirect following E-mail us...@domain.com

Re: filtering domains and e-mails - how ?

gt; us...@domain.com relay:[smtp1.server.com] > domain.com relay:[smtp.server.com] > > > See: Postfix users > > Zalezny Niezalezny wrote: > >> Hi All, by default in my Postfix configuration I`m routing all E-mails >> for the domain: >> *@domain.com <h

Postfix relay - allow authenticated users from any ip

Dear Colleague, I have small server at home (with dynamic IP) with Postfix as MTA. Because I`m using dynamic IP address, I decided to create simple relay server with static IP on amazon aws cloud. Here comes my question: 1. How to configure relay server which will relay all E-mails from authenti

Re: Postfix relay - allow authenticated users from any ip

-us...@dukhovni.org> wrote: > On Thu, May 26, 2016 at 11:40:22PM +0200, Zalezny Niezalezny wrote: > > > 1. How to configure relay server which will relay all E-mails from > > authenticated users from any IP. > > main.cf: > indexed = ${default_

Re: Postfix relay - allow authenticated users from any ip

Thank You very much for Your explanation. That sounds more clear for me. I will configure SASL Auth then. Thanks a lot every one! On Fri, May 27, 2016 at 2:14 PM, /dev/rob0 wrote: > On Fri, May 27, 2016 at 10:11:59AM +0200, Zalezny Niezalezny wrote: > > What about user ? Do i need

resolve local domain with MX records

Hi Everyone, in my Postfix I have configured something like this: /etc/postfix/main.cf # ### smtpd_sender_restrictions = check_sender_access regexp:/etc/postfix/check_sender_regexp # ### /etc/postfix/check_sender_regexp # #

Re: resolve local domain with MX records

Hallo Vietse, thank You very much for Your support and Postfix! I have one more question, maybe here You will be also able to help. You said that "Postfix will not look in DNS...". Our E-mail environment base on Postfix and Exchange and we are using local domains to balance E-mail traffic between

Re: resolve local domain with MX records

Hallo Wietse, yes I understand Your point. In my internal host, dns lookup is disabled. I simply would like to know how may I specified some additional hosts in case of accidents one of them. For example, in the transport table we have something like this: *example.com

Re: resolve local domain with MX records

I`m sorry, I sent my last email too fast. example.com:[192.168.2.10, 192.168.2.11] Will it be possible something like this ? Thanks in advance for Your support. Zalezny On Sun, May 29, 2016 at 10:44 AM, Zalezny Niezalezny < zalezny.niezale...@gmail.com> wrote: > Hallo Wietse,

Re: resolve local domain with MX records

Perfect! Thank You very much! On Sun, May 29, 2016 at 9:15 AM, Wietse Venema wrote: > Zalezny Niezalezny: > > Hallo Wietse, > > > > yes I understand Your point. > > > > In my internal host, dns lookup is disabled. I simply would like to know > > how may I

relay server - allow connections from DSL with dynamic IP

hi, my local MTA using DSL with dynamic IP address so I need to forward my messages to some external relay server with static IP. Unfortunately I`m not able to setup, my dynamic IP on the relay server in the network_table (or in the mynetworks). Base on the (ONLY) username and password (SASL) I w

postfix password authorisation not working

Hi, I just woudl like to know what I`m doing wrong. I read postfix documentation several times and I configured SASL authentication exacly as it was described. But even with this I do not see in the telnet output lines similar to this 250-AUTH DIGEST-MD5 PLAIN CRAM-MD5 This is my telnet output:

Re: postfix password authorisation not working

Hi Patrick, today evening I will try to open new session with openssl and then I will analyze what is in the output. This sounds logic. Thanks Vielen Dank und Viele Gruesse aus Bayern Zalezny On Tue, May 31, 2016 at 11:29 PM, Patrick Ben Koetter wrote: > * Zalezny Niezalezny : >

check_sender_regexp - multiple relay IP`s

Hi, I just would like to know if its possible to configure muliple IP`s of SMTP servers in this configuration file: check_sender_access regexp:/etc/postfix/check_sender_regexp At the moment we are forwarding message with following sender E-mail address to one of our MS Exchange servers. /zel

header_checks bypassing discard rules

Hi, using header_checks configuration we are dropping all outgoing E-mails except some of them. # discard all mails not going to cortalconsors.(de|fr) if /^to:/ !/^to:?$/ DISCARD discarded endif Following rules dropping all outgoing e-mails with recipeint domains different than extern.domain.c

Re: header_checks bypassing discard rules

gt; wrote: >> >> On 6/27/2016 3:39 AM, Zalezny Niezalezny wrote: >> >>> Hi, >>> >>> using header_checks configuration we are dropping all outgoing >>> E-mails except some of them. >>> >>> >>> # discard a

Re: header_checks bypassing discard rules

ke a charm. :) When I used "discard:" its not working. Postfix simply sending all E-mails out, but it should drop only those not listed before "* discard:". @Noel, Wietse - ThanXX Greetings Zalezny On Wed, Jun 29, 2016 at 3:01 PM, Wietse Venema wrote: > Zalezny Niezal

server / client configuration for Authenticated Relay server

Dear Colleagues, I`m trying to configure authenticated relay server (SASL) using RHEL Postfix 2.6.6. System will transport E-mails only from authenticated clients. 1) Most of that clients are in the same subnet, does it make sense to authtenicate that clients with passwords ? Do we need to use sa

recipient filtering and transport table - problem

Dear Colleagues, in our test app environment we are using real e-mail addresses to test. Each test application sending to our test relay server some e-mails. On that machine we are filtering all incoming E-mails from our test environment. - we are accepting E-mails addressed to our internal doma

Re: recipient filtering and transport table - problem

relay:relay.server.local * discard It will not work. How to do it properly ? Accept all To: *@mydomain.com except supp...@mydomain.com MfG Zalezny On Wed, Jul 13, 2016 at 1:06 PM, Wietse Venema wrote: > Zalezny Niezale

Re: recipient filtering and transport table - problem

Zalezny On Wed, Jul 13, 2016 at 3:36 PM, Wietse Venema wrote: > Zalezny Niezalezny: > > If I will put this to my transport file: > > > > supp...@mydomain.com discard > > mydomain.com

relay outage - bounce or deffered queue

Dear Colleagues, in our infrastructure we are using Postfix as a relay server which is responsible for transfering messages from our MS Exchange and Production systems. Our infrastructure include several Postfix relays: M$Exchange(lan) ---> Postfix1(middleware lan) ---> Postfix2(application lan)

Re: relay outage - bounce or deffered queue

Ok Thanks. On Wed, Aug 31, 2016 at 3:32 PM, Wietse Venema wrote: > Zalezny Niezalezny: > > Dear Colleagues, > > > > in our infrastructure we are using Postfix as a relay server which is > > responsible for transfering messages from our MS Exchange and Production >

bouce table - where to bounce specified E-mail

Hi, just a short question, is there any possibility in Postfix to control which E-mail should be bounced and which not ? We have some relay server which should not bounce some specified test e-mails (with error). Is there any bounce table ? Thanks in advance Zalezny

Re: bouce table - where to bounce specified E-mail

Hi , You suggest to remove sender address. How to do it in Postfix ? MfG Zalezny On Thu, Sep 1, 2016 at 4:19 PM, Wietse Venema wrote: > Zalezny Niezalezny: > > Hi, > > > > just a short question, is there any possibility in Postfix to control > which > > E-ma

Re: bouce table - where to bounce specified E-mail

Thank You Wietse for Your time and patient. I will read RFC first - for now topic is closed for me. On Thu, Sep 1, 2016 at 5:14 PM, Wietse Venema wrote: > Zalezny Niezalezny: > > Hi , > > > > You suggest to remove sender address. > > No, you SPECIFY the null sende

e-mail filtering base on the IP

Hi, is it possible to route messages base on the sender IP address ? So for example from host A I would like to route all messages to host Z and from the rest of the hosts to host Y. Is it possible some how to configure it ? With kind regards Zalezny

ezmlm idx and postfix

Hi, I have a short question. Is it possible to integrate ezmlm-idx with Postfix ? Does ony one of You knows how to do it ? I`m searching for some documentation for it, but everwhere is written that ezmlm working only with qmail... Thanks in advance for Your time and support. Cheers Zalezny

TLS issue

Hi, we have a problem with TLS on our Postfix server ec 2 10:12:03 postfix-server01 postfix/smtpd[37036]: connect from smtptransit.de.net.intra[152.21.2.44] Dec 2 10:12:03 postfix-server01 postfix/smtpd[37036]: SSL_accept error from smtptransit.de.net.intra[152.21.2.44]: -1 Dec 2 10:12:03 pos

Re: TLS issue

Problem is generated by one of our Ironport systems which is trying to establish TLS connection. In Postfix server I already configured it: smtpd_tls_mandatory_protocols = !SSLv2,!SSLv3 smtpd_tls_protocols = !SSLv2,!SSLv3 smtp_tls_protocols = !SSLv2,!SSLv3 I suspect that TLS client is not properl

Postfix migration from 2.0 to 2.6.6

HI All, on one of my servers I`m planning to migrate very old Postfix 2.0 to quite new one 2.6.6. I migrated already all Postfix instances, so all Postfix configuration files are already on the new machine (/etc/postfix*). Now its time to migrate /var/spool/postfix and all other Postfix data files

Re: Postfix migration from 2.0 to 2.6.6

:14, Zalezny Niezalezny > wrote: > > on one of my servers I`m planning to migrate very old Postfix 2.0 to quite > new one 2.6.6. > I migrated already all Postfix instances, so all Postfix configuration > files are already on the new machine (/etc/postfix*). Now its time to > mi

Re: Postfix migration from 2.0 to 2.6.6

We are just talking about messages in queue right? > > > 2015-02-20 10:54 GMT+01:00 Zalezny Niezalezny < > zalezny.niezale...@gmail.com>: > >> Thanks for Your explanation. I see that Postfix community is very strong >> and fast :) Its good to know :) >> >>

Re: Postfix migration from 2.0 to 2.6.6

I will simply stop postfix and copy all files. I dont see any other solution here.We will see if it will work properly. On Fri, Feb 20, 2015 at 11:28 AM, Michael wrote: > Quoting Zalezny Niezalezny : > > I dont want to route any E-mails. I simply would like to stop old serve

Re: Postfix migration from 2.0 to 2.6.6

Greetz to all and thanks for Your efficient support! Its perfect community :) On Fri, Feb 20, 2015 at 12:30 PM, Zalezny Niezalezny < zalezny.niezale...@gmail.com> wrote: > I will simply stop postfix and copy all files. I dont see any other > solution here.We will see if it will w

spamhaus - reasons of ban IP

Hi All, I would like to ask You what could be a reason of ban in Spamhaus. Today morning we have got message from our client that our system is not able to send E-mails. In did, system IP has been putted to black list. I have reviewed all logs and didnt found any good reason. System with Postfix

Re: spamhaus - reasons of ban IP

Paul, thank You very much for Your support. @Michael J Wise, that was question partly about Postfix. Please read more carefully all posts... > > Maybe Postfix will have some kind of debugging mode etc.etc. > Any how, thanks for Your support! On Mon, Jun 1, 2015 at 9:55 PM, Michael J Wise wr

check if user received messages

Dear Colleagues, is it possible to check in the Postfix logs if user delete/receive message ? Or to check if message was dropped by the server ? Thanks in advance Zalezny

Duplicate E-mails with different ID and timestamp

Hello Colleagues, on the one of our SMTP servers we are receiving a lot of duplicate messages with different time stamp and ID. The same message(with the same content) is received at : 11:20, 13:50, 16:30. What could be a reason for it ? Could it be a problem with Postfix server on the our client

E-mail encoding problem

Dear Colleagues, I`m trying to understand how E-mail encoding is working, maybe somebody will be able to explain me how its working with Postfix and some E-mail client like Thunderbird for example. When I`m sending an E-mail from server command line (telnet localhost 25) my E-mail has following h

check_sender_regexp - problem

Hi, in our environment we have two domains: example.com - 1.1.1.1 news.example.com - 2.2.2.2 configured on the external gateway. Each domain using separate IP addresses. Postfix mail server with mailboxes has been configured on the separate system: 3.3.3.3 >From this system we wou

send an email with specified sender/recipient address to different servers

Hi, I just would like to know, how may send specified messages to different hosts. /etc/postfix/transport domain.comrelay:mx-domain.local * host All E-mails To: u...@domain.com system sending to mx-domain.local. This is working fine. But what should I do if I would like to send an

send an email with specified sender/recipient address to different servers

Hi, I just would like to know, how may send specified messages to different hosts. /etc/postfix/transport domain.comrelay:mx-domain.local * host All E-mails To: u...@domain.com system sending to mx-domain.local. This is working fine. But what should I do, if I would like to send an

postfix relay - mass mailing - how to properly send messages

Hi, I have a short question. How to properly send messages from the big mailing lists. For example Mailman list with 50 000 or 100 000 subscribers. How to do it in the right way with which Postfix settings ? My Mailman server is connected to one of my mail gateways responsible for forwarding mess

Re: postfix relay - mass mailing - how to properly send messages

, 2017 at 7:38 PM, Viktor Dukhovni wrote: > > > On Mar 22, 2017, at 3:27 PM, Zalezny Niezalezny < > zalezny.niezale...@gmail.com> wrote: > > > > My Mailman server is connected to one of my mail gateways responsible > for forwarding messages to the client from the

separate TLS certificates for virtual domains - how ?

Hi, is it possible to setup separate SSL certificates for an each virtual domain ? Thanks in advance for any support. Cheers Konrad

transport table - and regular expression for dynamic generated e-mails

Hi, I would like to route some dynamic generated E-mails to some server. My E-mail looks as follow: Original E-mail: testm...@example.com I have a problem with routing that E-mail: Dynamic generate E-mail: testmail-3995485839...@example.com Domain: example.com /etc/postfix/transport file look

Re: transport table - and regular expression for dynamic generated e-mails

HI You mean /etc/postfix/transport in main.cf ? Zalezny On Tue, Mar 28, 2017 at 10:02 AM, Wolfe, Robert < robert.wo...@robertwolfe.org> wrote: > Do you have a transport mapping file set up by any chance? > > -- > *From:* Zalezny Niezalezny [mail

Re: transport table - and regular expression for dynamic generated e-mails tha

Jones" napisał(a): On 3/28/2017 2:59 AM, Zalezny Niezalezny wrote: > Hi, > > I would like to route some dynamic generated E-mails to some server. > > My E-mail looks as follow: > > Original E-mail: testm...@example.com <mailto:testm...@example.com> > > I have a

message_size_limit - how to configure on multiple instances ?

Hi, I have a serious Problem. On my server I have 2 postfix instances. On the master instance I have changed message size limit from 10Mb to 30Mb. Unfortuantely postconf shows still 10MB. How may I change this? Postfix instances on my server: [root@unixserver5 opt]# postmulti -l -

how to remove string "[MASSMAIL]" from the subject ?

Hi, will it be possible to remove string [MASSMAIL] from outgoing E-mails ? From: bla!@firma.com to: *@gmail.com Subject: [MASSMAIL] text of the messages I would like to have some thing like this. From: bla!@firma.com to: *@gmail.com Subject: text of the messages Unfortunatelly Mailman addin

Re: how to remove string "[MASSMAIL]" from the subject ?

ll us what else is handling the email before it makes it to > your mailbox. > > Also, reply on list, not directly to me. Future emails sent directly to me > will be ignored. > > -- > Larry Stone > lston...@stonejongleux.com > > > > > > > On Mar 31, 2017, at 6:03

Re: how to remove string "[MASSMAIL]" from the subject ?

at 1:29 PM, Zalezny Niezalezny < zalezny.niezale...@gmail.com> wrote: > This list (postfix-users) is so configured that when I`m clicking Reply on > Your answer, system sending message to directly to you instead of the list. > On mobile device some times its difficult. It was not my inten

Re: how to remove string "[MASSMAIL]" from the subject ?

ndt : > > * Zalezny Niezalezny : > > > As I see here header_checks can do it. There is only one problem. This > rule > > > searching for a subject with string [MASSMAIL] and replacing complete > > > subject line with word "test". > > > > > >

Re: message_size_limit - how to configure on multiple instances ?

thank You all :) 30 mar 2017 21:47 "Viktor Dukhovni" napisał(a): > > > On Mar 30, 2017, at 12:35 PM, Zalezny Niezalezny < > zalezny.niezale...@gmail.com> wrote: > > > > # postconf -d | grep message > > The "postconf -d" command retur

relay server - mass mailing tuning

Hi, in the next days our external service provider will push to our relay server (Postfix) regulary ~300 000 - 500 000 E-mails with size 60-500kb. External system provider has a SMTP server farm, so it will send messages from ~20 IP`s to our single Postfix instance. My question is, do I need to

TLS security rules - perfect setup and issue with anonymous cipher

Hi, first of all I would like to say "thank You" for the answers on my previous questions. I read all of them, they were helpful but I missed to say "BIG THANKS!" I have a security question. My Postfix 2.10.1 Server TLS configuration looks like this at the moment. #TLS Server configuration smt

postfix client closing connection (email delivery) if one of multiple recipients failed/filtered

Hi, I have exacly the same problem as described here in that post and I do not know what to do. http://postfix.1071664.n5.nabble.com/Customize-configure-postfix-with-multiple-recipients-td45030.html In our network we are relaying messages using Postfix. When our application sending a message wi

SMTP session failure: 501 5.1.7 - how to solve it ?

Dear Colleagues, I have a problem with my Postfix/Mailman configuration. Basicly everything is working fine except one thing. When I`m sending message to mailman admins: From: u...@example.com To: mailman-ow...@list.example.com Postfix generating SMTP session failure. Jun 23 10:59:25 2017 (

postfix + selinux - does it make sense ?

Hi, I would like to know Your opinion about selinux + postfix ? Does onyone using it ? Does it make sense to setup some policies for postfix ? Thanks in advance for your answers and suggestions. Cheers Zalezny

Re: postfix + selinux - does it make sense ?

I think that Postfix is one of the most secure servers. I will stay with basic SE settings. On Tue, Jul 11, 2017 at 1:01 PM, Wietse Venema wrote: > Zalezny Niezalezny: > > Hi, > > > > I would like to know Your opinion about selinux + postfix ? > > > > Does ony