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
43 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
56 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
17 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
49 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
20 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 ...
-1
votes
1answer
43 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
66 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
64 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
40 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
30 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
18 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
55 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
100 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
52 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 ...
0
votes
1answer
41 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
11 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 ...
1
vote
1answer
33 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
15 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
48 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
47 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
22 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
22 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
57 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
5 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
65 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
24 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
30 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
50 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
46 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
90 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
157 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
16 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
91 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 ...
0
votes
1answer
317 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
271 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
22 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
18 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
23 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
19 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 ...
1
vote
0answers
105 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 ...
0
votes
1answer
49 views

Does DMARC send alerts even upon successful delivery?

I keep getting DMARC reports that show that my IP passed all SPF and DKIM checks. Is this just an email to say that everything's fine or is it an indication of a problem? If the latter, there's ...
0
votes
0answers
41 views

Postfix bouncing emails submitted through pipe

I have a Postfix with a piped content filter which tries to locally deliver the messages before sending them out, resulting in a bounce notification for each event. According to the Postfix ...
2
votes
1answer
256 views

Creating tickets with Email in osTicket

I have just installed an osTicket server for our company and I have problem with creating tickets from email. I'm using Postfix as my SMTP server and Dovecot as my IMAP server. In osTicket panel I ...
1
vote
2answers
103 views

DNS resolving error in postfix mail queue

mailq gives me this error: F2E7B32820F3 3549 Wed Feb 17 12:15:50 "www-data@info"@hivemind.ru (host mxs.mail.ru[94.100.180.150] said: 421 Problem resolving DNS for domain info"@hivemind.ru ...
0
votes
1answer
24 views

Postfix: Send all mailq messages to a single file

Wouldn't be nice to create a single file by appending all messages from mailq. For instance for a single message you would add postcat -q 91D65348E0EA > listofallmessages then for the next you ...
0
votes
2answers
37 views

Postfix: How to check from what script the message has been sent?

Does postfix know the origin script that sent the email somehow? Is it possible to track the web scripts that sent the email? I am on a web farm having sites A, B, C. Site A has scripts a.php, site ...
1
vote
0answers
61 views

Postfix with Dovecot Disconnects after STARTTLS on Port 25

I am having a lot of trouble setting up the Postfix to do STARTTLS. It seems that I could successfully send outgoing mail using Thunderbird. However, I can't seem to get the Postman SMTP for Wordpress ...
0
votes
1answer
23 views

Open relay or some other issue?

I am running a dovecot/postfix server with virtual users/aliases. According to tools such as http://www.mailradar.com/openrelay/ I do not have any open relays. However, I am getting a lot of records ...