Tagged Questions

Postfix is a mail transfer agent (MTA) that supports LDAP, SMTP AUTH (SASL) and TLS. Postfix was written by Wietse Venema in 1997 and first released in December 1998 as IBM Secure Mailer. It was designed to be highly secure and configurable, and is a drop-in replacement for sendmail. The ...

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1answer
31 views

How to migrate from qmail to postfix?

I am looking for a clear and detailed guide to do the migration on Linux but I could not find anything useful. So appreciate your hints.
1
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1answer
32 views

How can I stress test my Postfix system without actually sending existing addesses mails?

I'd like to stress my Postfix servers, and I need to make a huge amount of sendings, but of course, I don't want to send spam to any real address, and I don't my IP's to be blacklisted. Is there any ...
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0answers
25 views

SASL authentication failed

I try to send mail by sasl authentication from one server to another server. I am using postfix in centos. and dnsload balancing for email I am sure that authentications are ok. but it show following ...
4
votes
1answer
29 views

How to log extension header in postfix log?

I have postfix running as a relay server. In normal configuration, postfix does logging for "from" and "to" header. I would like postfix to log additional extension header eg. ...
0
votes
1answer
16 views

postfix global white/blacklist defined by pair

I have defined global whitelist in postfix using MYSQL with the following options: smtpd_recipient_restrictions = reject_invalid_hostname, check_client_access ...
0
votes
1answer
38 views

Setup Postfix as a relay / filter

I need to have Postfix set up to work with Lamson. Despite my research on the web, i haven't figured out how to configure postfix. I'll have a server (A) that will forward all its email to a second ...
0
votes
1answer
16 views

Postfix relay ldap lookups and transport

I'm trying to implement postfix + policyd/amavis + dspam. The problem is that I need to do ldap lookups in order to obtain the nexthop. But at the same time I need to redirect some "email address" to ...
1
vote
0answers
30 views

389 Directory Server + Zarafa + Postfix

I am installing two servers, one with 389 directory server and another with zarafa+postfix. I already managed to integrate the ldap authentication with zarafa but each time a try to send an email i'm ...
-6
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0answers
37 views

SMTP server - sending 100 000 emails/day [closed]

I m facing issue with sending large amount of emails (cca 100 000) per day. This emails should be send within 1-2 hours. Each email will be unique and to unique person. We have decided to build own ...
0
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1answer
26 views

Forwarding mail to different mail system in Postfix

I have an e-mail server powered by Postfix. Aside from traditional e-mail accounts on my server, I want to maintain some accounts whose only role is to forward all incoming mail to differnet address ...
4
votes
1answer
33 views

How can I see the contents of the mail who's ID I get from mailq command?

I used mailq command and I got a line like for example: A705238B4C 603953 Wed May 23 11:09:58 apache@myserver.com So, now I'm wondering is there a way where I can "read" an actual content of the ...
0
votes
1answer
14 views

Rewrite header when no dkim header for specific domains

I have been receiving a lot of mails that are "From" my domain. These mails have usually a different return path (spf passes), but have for example my email in the to and the from header. ...
1
vote
1answer
20 views

Disable local recipient check in Postfix

I am trying to setup Postfix on CentOS. I have configured it to use my Google apps account to send mails. Lets say I have configured Postfix to use user1@mydomain.net, which is a Google apps email. I ...
1
vote
2answers
38 views

Postfix - how to add emails to the queue without being delivered?

I have a quick question. How does one add emails to Postfix's queue without it delivering the emails? I am writing a script to email Postfix statistics (queue count, sent, etc) to our support staff. I ...
2
votes
0answers
104 views

Postfix not sending email after upgrading to Ubuntu 12.04

After upgrading a server from Ubuntu 10.04 to 12.04, postfix is no longer sending email through sendgrid.com. I followed this guide about 6 months ago and everything had been working perfectly until ...
0
votes
1answer
31 views

Issue with sending mails from thunderbird via postfix

I run into problem where I cannot send mail via SMTP by using for example Thunderbird - but locally from machine, mail sending works perfectly fine. Mail server got configured also dovecot - that is ...
4
votes
3answers
168 views
+50

PTR OK, SPF, DKIM passed but email messages are marked as Spam by Google?

# host 1.2.3.4 4.3.2.1.in-addr.arpa domain name pointer mail.domain.vn. # dig +short txt domain.vn "v=spf1 a mx ptr -all" # dig +short txt mail.domain.vn "v=spf1 a -all" Here's an email header ...
3
votes
2answers
28 views

How to get Postfix statistics of second instance?

I have a quick question. I have two instances of Postfix running on an Ubuntu server and I want to write some scripts to email our server admin Postfix statistics (queue count, sent, etc). How would I ...
0
votes
0answers
16 views

Virtual Mailbox Users?

Should i use virtual mailbox users accounts? What is the benefit. I understand the traditional way is by creating a system user. Does virtualmin / webmin support virtual mail accounts?
0
votes
2answers
58 views

Postfix add custom header with random value

I am trying to add a custom header to all messages handled by my postfix server. I tried using a guide on the internet without any luck. In my master.cf i added: -o ...
0
votes
1answer
47 views

Intermediate queues in postfix

I'm trying to implement a mail server with postfix + policyd/amavis + mysql white/blacklist lookups. The problem is that I would like to have "intermediate" queue between them in case one of them ...
1
vote
1answer
31 views

Why does Postfix change the message-id of my mails?

I have a firstline / graveyard system of Postfix. So, one server is the graveyard of the first line server. I managed this by setting the smtp_fallback_relay in the first line server. So far, so ...
0
votes
1answer
27 views

Effective configuration of dkimproxy in multiple-domain scenario

I have a postfix/dkimproxy setup that doesn't work the way I like. I have exampledomain.org with SPF allowing mail only from server.exampledomain.org (rDNS mapped correctly) which is also aliased by ...
1
vote
3answers
46 views

Postfix and Sendmail restriction for Spam

I have Postfix mail server. The mail server was spamming from an unexisting mail address so i used sender_restrictions in main.cf and sender_access (to discard mail from that mail address). Now the ...
0
votes
1answer
43 views

Can't receive emails using Postfix: Status=deferred (conversation with 127.0.0.1[127.0.0.1] timed out while receiving the initial server greeting)

I was setting up a server until about a month ago when I had to stop for personal reasons. I've went back to it today and tried to send/receive emails. Initially, I sent myself an email from my Gmail ...
1
vote
2answers
72 views

YUM dependency issue

I've installed Percona Xtradb server but in order to install it I had to remove "mysql-libs.x86_64" package and now I'm not able to install any package that depends on it (postfix, Nagios mysql plugin ...
1
vote
1answer
22 views

Can you set Postfix to enforce TLS on incoming email only from certain domains or IPs?

I'm looking for a Postfix configuration option like smtpd_enforce_tls but one that lets me enforce TLS selectively, depending on what domain the email is coming in from. I need to allow non-TLS ...
0
votes
3answers
45 views

Postfix add computername on subject

I have several ubuntu servers / desktops running on the same machine using kvm (under ubuntu server 12.04) With postfix on each virtual machine I've redirected each root's mail to my gmail account. ...
0
votes
0answers
31 views

Ubuntu sendmail not sending emails to Google Mail (gmail)

I've configured a very basic postfix email server to send emails via django / sendmail. Everything works fine for Apple Mail (me.com) and other email accounts I have, but is not working for gmail. I ...
0
votes
1answer
22 views

Remove (Postfix) pattern in postfix email header

Due security due diligent, we need to remove the pattern (Postfix) in our email header. Here is an eg: Received: from Simon-Vs-MBCuiPap.local (unknown [118.69.224.5]) (using TLSv1 with cipher ...
0
votes
1answer
54 views

Postfix transport maps

I have 2 servers (A,B) with email server working. I am trying to replicate all emails sent to server A to server B using transport map. My transport table is CREATE TABLE `transport` ( `domain` ...
0
votes
0answers
10 views

Can only post on any mailman list from localhost

I am running mailman on a Debian Squeeze server, using Postfix as the MTA. The problem I have is very simple: only messages sent from within the server are posted to the subscribers. If I try to post ...
0
votes
0answers
34 views

Using Postfix for sending emails through an external SMTP server, but also for sending local emails

So I am currently setting up Request-Tracker4 and want the following: Receiving emails through Thunderbird and forward them to the local email server The email server then inserts them into ...
1
vote
1answer
33 views

Setting up Postfix when hosting multiple domains

I only know enough Ubuntu to be dangerous, so I could use some advice. I'm using Linode to host a couple of domains. Let's call them: www.company.com www.product.com dev.product.com The server's ...
0
votes
0answers
35 views

Virtualmin + PostFix + DKIM + Amazon SES

I have a little different setup that I was able to found, until I decided that I need your help. I have a South America t1.micro instance in Amazon EC2. All properly set with Virtualmin (to make my ...
2
votes
1answer
24 views

Drop all emails that aren't forwarded by postfix

I'm setting up a forwarding only email server. I want to apply some static forwarding rules to all incoming emails and bounce all other incoming emails (and not store them locally). ...
1
vote
1answer
100 views

Emails forwarded via postfix get flagged as spam and forged in Gmail

I'm trying to setup a forwarding only email server. I'm running into the problem where all messages forwarded via postfix are getting put into gmail's spam folder and getting flagged as forged. I'm ...
1
vote
1answer
41 views

Setting bounce address using postfix

I want to set the bounce address or return path address to a particular email address(say someemail@example.com). Such that whenever a mail bounces it will send a reply to someemail@example.com. How ...
-3
votes
0answers
36 views

Postfix Sending spam mail

We have a postfix mail server ex mail.abc.com Our email is in the format xxx@abc.com In the postfix queue lot of mail are sent from software@hostname.abc.in I want to deny only that id from sending ...
0
votes
0answers
19 views

How do I configure Postfix to not accept messages for invalid recipients?

As with all mail servers, mine frequently receives spam for invalid recipient addresses. What configuration values will force Postfix to immediately reject these messages? Furthermore, if Postfix is ...
0
votes
1answer
106 views

postfix error message

Sometimes in my mail.log I see bounced emails with error messages 550-Please turn on SMTP Authentication in your mail client, or login to the 550-IMAP/POP3 server before sending your message I ...
3
votes
1answer
55 views

What is the best way to setup redundant pop servers?

I am in charge of setting up our company email infrastructure and have a question on how to setup redundant pop/IMAP servers. I understand that I can setup failover for inbound email using MX records ...
2
votes
2answers
59 views

Use different relay in postfix

In our application, we send different kind of mails. On a broad view we can generalize it in two category, Mails which monitor the health of the app. Mails which we send to end user. Is there any ...
-1
votes
1answer
85 views

cannot receive email: DNS issue or Postfix bad configuration?

I've recently change the hosting for my site and one of the things I had to do was to move the email server (update DNS with new IP and MX records ...) I am using Postfix + Dovecot on CentOS 5.8. The ...
-2
votes
1answer
103 views

Configuring postfix to fight spam, 2012 edition [closed]

EDIT: This question was poorly asked, later I found another question which answers what i wanted to know: Spam prevention tips for Postfix I'm running a small (20 users, 30 mailman-lists) server with ...
-2
votes
2answers
44 views

Postfix Relay Access Denied

I have my postfix server running with MySQL and squirrelmail, and everything works fine, however when I attempt to send an e-mail from a remote client, I get a relay access denied error, after much ...
0
votes
3answers
71 views

Receive emails on Amazon EC2 Server

I just got started with an EC2 instance and got my mail sending limit removed, allowing me to send emails from my instance. But due to lack of experience, I have no clue on how to enable receiving ...
2
votes
1answer
21 views

setup postfix or equiv to only forward to new address

Is there a dead easy way to set up an MTA to only redirect incoming mail user@mydomain.com -> myCheapGmailAccount@gmail.com Yes, I've tried various postfix guides but I'm lost in configuration. ...
1
vote
0answers
37 views

How do I use an encrypted MySQL password with Cyrus SASL?

In /etc/postfix/sasl/smtpd.conf I have: auxprop_plugin: sql sql_engine: mysql sql_hostnames: 127.0.0.1 sql_database: mail sql_user: mailadmin sql_passwd: secret sql_select: SELECT password FROM users ...
1
vote
3answers
84 views

Pipe all email sent by an authenticated connection to an external script and still deliver it to the recipient

Using Postfix I want to pipe all messages sent by an authenticated connection to an external script and still deliver it to the recipient. Is this possible and if so how?

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