Free and open source mail transfer agent (MTA) that routes and delivers email. When asking about postfix problem, please include the relevant maillog lines and output of the following command: "postconf -n" (content of main.cf) and/or "postconf -M" (content of master.cf)

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1
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0answers
38 views

Postfix send SPAM

I come a few days being listed in the Spamhaus CBL. CBL list reports that I have a virus on the network and that is sending emails as "localhost.localdomain". I do not know where to be coming this "...
0
votes
1answer
19 views

Postfix ignores virtual_transport setting for LMTP

I was trying to use LMTP instead of the standard LDA via UNIX-pipe for the mail transport from postfix to dovecot. I configured dovecot and installed dovecot-lmtp, now i have an (non-public) LMTP-...
0
votes
1answer
28 views

Postfix header_checks and unicode regexp

Does postfix support unicode regular expressions like \p{Han} to detect unicode scripts? I would like to use them with header_checks.
1
vote
2answers
310 views

Spamassassin, Dovecot and Postfix: Move spam to folder

I am trying to move Spam detected by spamassassin automatically to the Junk folder on Debian Jessie. I installed Spamassassin and edited the configs: local.cf (spamassassin folder) rewrite_header ...
0
votes
1answer
67 views

Postfix doesn't send bounce on reject

I have a Postfix (2.6) installation on a dedicated server. When I try to send a message to a non existing domain, I get this line in my mail.log: postfix/smtpd[11069]: NOQUEUE: reject: RCPT from [.....
0
votes
0answers
31 views

Postfix and PostgreSQL: How to make same aliases work for different domains?

I've currently three domains. I want to setup (mostly) the same aliases for every domain and retrieve the mails on Thunderbird. It already works to send/receive mails for contact@domain1.com, contact@...
1
vote
0answers
93 views

Problems whitelisting senders in Amavis-new

I've a CentOS6 server with Amavis 2.9.1 + Postfix 2.6.6 + clamav 0.99 that I use as mail relay (aka mail gateway), with network set as follow: eth0 (10.10.132.104) as external inteface eth1 (10.10.133....
0
votes
2answers
89 views

I can't send a message with postfix. Error: “Must issue STARTTLS first”

I am novice with postfix. My goal is to use it with fan/nagios/centreon in order to receive notifications. I have tried many solutions found on this forum or thanks to google, but it didn't resolve my ...
1
vote
0answers
64 views

SSL_accept error with postfix oportunistic STARTTLS

I have configured postfix 2.6.6 on centos 6 as a mailrealy in front of an exchange 2010 server. Things work. Now I would like to add oportunistic encryption to incomming and outgoing mail. At least ...
1
vote
1answer
58 views

saslauthd running in segfault after some time

I'm using postfix with courier and mysql for authentication. Lately I have some segmentation faults, which causes sasl deamon to crash. It seems, the have something to do with dictionary attacks on ...
0
votes
1answer
22 views

sasl_username does not appear in my maillog logfile

I've got some servers that do not log the user when processing mail. Packages involved are postfix 2:2.11.5-centos5.15072015 and cyrus-sasl-2.1.22-7.el5_8.1.x86_64 There is no sasl_username on the ...
0
votes
1answer
57 views

Add email recipient in header in Postfix

I have an email virtual alias in Postfix that forwards the email to another address: email1@domain1.com -> email2@domain2.com. The domain2.com is a catch-all that parses the email and sends it to a ...
0
votes
0answers
24 views

Error Authenticate with Dovecot

I have setup a mailserver.. The problem with mailserver is that it doesnt authenticate /var/log/maillog shows: Mar 14 13:43:40 mailserver dovecot: auth: mysql: Connected to 127.0.0.1 (mailserver)...
-1
votes
1answer
46 views

Why does Google junk mails from my server? [duplicate]

I have a send-only mail server setup on an Ubuntu VPS. The mail server is only used to send out registration e-mails from a web application. I have the following configured: DomainKeys Identified ...
0
votes
1answer
88 views

Ubuntu/Postfix not receiving emails from outside

I am trying to configure my Amazon EC2 instance to receive emails with postfix. I tried for hours but I never received an email. If I send email from same server terminal it works. This is working ...
1
vote
2answers
77 views

huge amount of data is written to mail.log once every minute

I'm on Ubuntu server and a huge amount of lines is written to my /var/log/mail.log once every minute. The lines look like: Mar 11 17:39:08 Ubuntu-1010-maverick-32-minimal postfix/qmgr[1085]: ...
2
votes
2answers
69 views

How to set multiple relayhost in postfix?

I want to have a list of hosts in relayhost, and when postfix tries to send an email, it sends it to any of them, and if that one is offline, it tries another one. Can it be done in the config-file, ...
0
votes
1answer
33 views

Difference between DKIM and DomainKeys

There are two methods for signing mail out there (DKIM and DomainKeys). While some sources say that DomainKeys are "ancient", others say you need both, even though to my understanding they do almost ...
0
votes
1answer
20 views

Postfix, make “Connect from” and “Disconnect from” message to not appear in the log

How can I configure postfix for it will NOT log "Connect from" and "Disconnect from" events?
2
votes
2answers
59 views

Send Postfix outgoing mail through a Google Apps alias

I have a domain example.com set up as follows A server hosts a website and other some other stuff Google Apps handles my email and is configured to send and receive it Whenever the server needs to ...
4
votes
1answer
105 views

Postfix: require valid sender address

Few days ago I received a message with ""@smtp.enta.net as the sender in both the From: and Return-Path headers. Postfix accepted that email and transport it to dovecot. Is it possible to configure ...
1
vote
1answer
57 views

Fail2ban bans me after sending successful 5 mails

Dear all I am using Fail2Ban v0.8.13 on CentOS 6 system in order to protect my Postfix servers. Basically it works so after 5 wrong login attempts on SMTP I get banned. Fail2Ban Jail conf [sasl-...
0
votes
1answer
48 views

Configuring postfix to work with TLS (mediawiki)

I have a couple of questions regarding postfix config. First of all I need TLS as of the pear smtp plugin mediawiki uses, forces TLS authentication. Will it work on 25? Or what's the advised port? ...
0
votes
0answers
13 views

Right way to force autresponder script to authenticate against postfix

I'm running Postfix 2.11.1 and i've configured an autoresponder by adding those lines to postfix's master.cf postfix_response unix - n n - - pipe flags=Rq user=...
1
vote
1answer
36 views

Postfix Hostname domainbased

I would like to excuse in advance, if my question has already been answered before but im going crazy since a week now... I'm not new to this but after a while in another job, my "skills" are totally ...
0
votes
0answers
16 views

Disable soft_bounce just for not existing recipient

We have postfix server. Some times, there is mail that can not be delivered. We have soft_bounce = yes In this case, service response to the sender. But some times the sender is spammer and "from" ...
0
votes
1answer
56 views

SPF in hotmail are not used [duplicate]

I have a problem with Hotmail provider, all mail sent from my server goes to SPAM folder. I Have added a correct SPF to my domain example.com but into the headers is not used (spf=none) and the token ...
-1
votes
1answer
59 views

rsyslog limit log size

Is this even possible to do in rsyslog? http://www.rsyslog.com/doc/rsyslog_conf_output.html This syntax is not working: mail.* -/var/log/mail.log:300M I need to set this limitation ...
-1
votes
1answer
24 views

Postfix no longer reciving mail

I installed and configured a mail server with postfix(3.1.0-1)+dovecot(2.2.21) on archlinux(4.4.3-1) in December, and on which in confirmed it to be working, both receiving and sending. About a week ...
0
votes
0answers
24 views

Controlling Postfix Recipients

I am in the process of setting up a Postfix\Dovecot email system that is going to be used by our customers. One requirement of the system is the ability to strictly limit who a user can send\receive ...
0
votes
0answers
23 views

Cache status code of rejected relayed mail to immediately block aggressive clients?

A legitimate client relays mail over mail server A to the destination server B. B rejects mail to recipient with status code 554 and the reason "Unknown recipient". Can this rejection be "cached" for ...
0
votes
0answers
68 views

Postfix virtual mailboxes, catch-all, relay only a few of them to another server based on recipient address

I'm using Postfix as a main MX server, connected to internet. On LAN I have MS Exchange, not accessible from internet. Postfix works fine with virtual mailboxes, Dovecot for POP3/IMAP etc. I'm using ...
0
votes
0answers
7 views

Postfix DSN suppress DSN in relaying host

I have following scenario with Delivery Status Notification smtp-client === host1(postfix) === host2 == .. === host_N I would like the smtp-client to receive DSN from host1 (sucess,delay,fail) but ...
0
votes
1answer
68 views

Can't open port

I can't open port 25 and 587. Background information: I am running CentOS 7 with firewalld and httpd. Now I want to run a mailserver. I started with installing postfix. Then I added firewall rules for ...
1
vote
0answers
25 views

what's the difference between '/etc/aliases' and /etc/postfix/aliases'

In my system I've noticed that there are these two files, coming from different packages: /etc/aliases --> netcfg-11.5-27.1.noarch /etc/postfix/aliases --> postfix-2.11.6-19.1.x86_64 I've also ...
0
votes
1answer
38 views

Postfix per domain quota

We are using a combination of Postfix 2.11.0 and Dovecot 2.2.9 as MTA/MDA. As a frontend for managing mail domains and mailboxes postfix.admin is used. Since allowing users to add mailboxes to their ...
-2
votes
2answers
63 views

Cannot connect to Postfix from Outlook or Thunderbird

I've managed to install postfix, it works, when i am logged into my VPS as root I can send and receive mail fine. But the problem is i cannot connect with thunderbird or outlook. I also cannot ...
0
votes
0answers
19 views

Postfix whitelisting email before filter

I using renattach to strip certain attachments from emails (following this tutorial: https://crcok.wordpress.com/2015/03/15/disable-attachments-in-postfix/). It is integrated into the mail system ...
1
vote
1answer
51 views

forwarding mail loop in postfix

recently i configured my postfix server with dovecot, sasl and ldap according some tutorials. it works fine indeed but always when i receive email it disappears after literally 5 minutes, postfix says ...
0
votes
1answer
104 views

Postfix/Dovecot Email Server (on Raspberry Pi) - Unable to configure POP3S connection with Gmail

I've been trying to configure my Raspberry Pi (Raspbian Jessie Lite) as a postfix/dovecot email server for my domain dominicgkerr.co.uk. Using a combination of the fantastic walkthroughs written by ...
5
votes
1answer
217 views

Postfix “Trusted TLS connection established” but “Server certificate not verified”

I´m using a Postfix TLS Policy to enforce TLS for outgoing email. Unfortunately in some cases the certificate verification fails and I don´t know why. For instance, this is an excerpt of my TLS ...
0
votes
0answers
17 views

Configure Postfix to relay mail to another server ONLY if TLS fails for the original destination?

Currently, Postfix is set up to send encrypted email using TLS, but not all destinations support TLS encryption. I assume it's possible to configure Postfix so that it securely relays the mail to ...
3
votes
2answers
99 views

Postfix sender address rejected / using multiple addresses

I have an email server running Postfix that generally works great. I'm trying to use this server as the SMTP server for outgoing mail in a CRM/Marketing platform installation. I've entered the ...
1
vote
1answer
508 views

Configure postfix to use Google Apps SMTP relay in a Google Compute Engine instance

What are the steps to set up postfix as SMTP relay that uses the Google Apps SMTP relay. There are a bunch of tutorials on the web that explain how to use the smtp.gmail.com gateway with SASL ...
0
votes
2answers
335 views

Postfix as SMTP server for Gmail. (“Send mail as” google option)

I have a vps on ovh.com runing debian 7. I want to set up my gmail account to send, and recieve mail on (for example) myname@mydomain.com address. I searched google for hours and couldn't find a ...
0
votes
0answers
25 views

Postfix Remove Defer Permission Denied

I am running a postfix mail relay server that handles outgoing emails from several websites that we host. Occasionally it seems that a specific email will get stuck and postfix refuses to process any ...
0
votes
0answers
21 views

postfix : Cannot send email using mail() function in PHP

My question may seems duplicate. But I did not find any question with the same environment as mine. I'm using Postfix under CentOS 6.4. I am also using LAMPP. This server does not have iptables ...
1
vote
1answer
25 views

Postfix: Keep mails in Backup-Queue even if next hops says 500

We have lost some mails because the next smtp hop (internal server) had a broken configuration and replied with 500 "won't relay". Is there a way to configure postfix to keep the mails in some ...
2
votes
2answers
20 views

Sendmail and matching recipient against a list of known-good, non local, addresses

the feature I am after is similar to the postfix's relay_recipients, but I need to do it in sendmail. I have a list of known good recipient addresses on a server for which this machine acts as the net-...
1
vote
0answers
167 views

postqueue: fatal: Cannot flush mail queue - mail system is down

Setting up a server, and I am having the damnest time getting postfix to send out an email! I have several emails in the queue, but when I force them I get this: postqueue: warning: unable to look ...