Postfix is a free and open-source mail transfer agent (also "MTA"), written in 1997 and still actively developed.

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9 views

postfix is appending dns suffix

When I attempt to send a message via postfix, my configuration uses a relayhost: relayhost = mail.example.local I can do an nslookup on this record, but when I attempt to send a message via postfix, ...
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16 views

Stop open relay in Postfix/Dovecot

I have a mail server set up with Postifx/Dovecot/MariaDB in CentOS 7. It is somehow configured as an open relay. Do you have any idea how to stop this? Config files below: master.cf # # Postfix ...
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25 views

Postfix relay should depend on sender

I have a Linux server with Postfix, and I need to send mail with several different sender addresses. Something like this: If the outgoing mail contains From: xxx@alpha.com, Postfix should use one set ...
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1answer
26 views

postfix, dovecot and usernames different to e-mail addresses

I want to replace an old mailserver setup with postfix+dovecot. The problem I'm facing now is, that the old system had usernames different to the e-mail address of the user. For example: E-Mail-...
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28 views

How do I block non-local domains from sending local mail through postfix?

I have postfix running under Alpine docker. If I start it up like so: docker run --name local -it -p 2500:25 alpine sh / # apk update && apk add postfix / # newaliases / # mkdir /var/mail / # ...
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11 views

dovecot, postfix mail wont encrypt

I tried to install a mail server on my debian 8 vServer. I followed a tutorial, step by step. Everything works fine, but when I send mails to my private google mail account, google mail puts that mail ...
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1answer
15 views

Postfix keeps saying wrong MySQL-Syntax

I have the following Postfix config-file to map an email to itself (All credentials are fictional): user = db_mailuser password = mailuser_password hosts = 127.0.0.1 dbname = mailserver query = ...
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1answer
35 views

How to set up Postfix to save the message body in the log file?

I need all the body of incoming and outgoing messages are written to the log file. How to setup Postfix to do that?
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21 views

Has my virtual alias table somehow been exposed?

I run a CentOS server with postfix 2.6.6-6.el6_5 (just updated to 2:2.6.6-6.el6_7.1 a few minutes ago). I use the mail server to do aliasing and to send out some email from localhost to users for the ...
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42 views

Postfix setup with Dovecot, MySQL error when sending mail

So, following problem. I'm trying to setup a Mailserver loosely following this tutorial here: https://workaround.org/ispmail/wheezy/ The problem starts when I try to send my first testmail (inside ...
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15 views

Postfix maillog interpretation

What gives me trouble is this: May 17 03:27:31 server postfix/qmgr[6628]: 96SE62EI0T6H: from=<some.address@domain.bla>, size=4893, nrcpt=30 (queue active) This line is normal, but, as I saw ...
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30 views

Postfix with Relay and fetchmail

I have a server with Zarafa, Postfix and fetchmail. I have a local domain: mylocaldomain.com The local domain is configured on my server as mydomains on postfix. So every mail to @mylocaldomain.com ...
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18 views

Setting up email server with postfix

I am setting up an email server on Amazon ec2 running Ubuntu 14.04 using postfix. I am trying to have emails come from: user@example.com In postfix, I have the following set inside /etc/postfix/...
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35 views

postfix gateway reject incoming spoofed emails from my domain

I have a postfix gateway. It only allows emails from the outside to a list of internal users in mydomain.com and it allow emails from my internal mail server to go out to the internet. There is no ...
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1answer
16 views

Where is the email address for maillog set?

I've got a CentOS 6.7 system that currently emails a certain address to send system messages (for example, it emailed with the body "Terminated" to indicate a process spawned by cron that was killed ...
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1answer
196 views

Postfix problems sending mail to gmail addresses

I have just installed Postfix and while recieving email seems to work fine, I have trouble sending email. When I send mail to an address provided by my ISP, the mail gets delivered successfully. The ...
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40 views

postfix redirect mail to transport going round relayhost

I have worked correctly postfix with this setting: main.cf smtp_sender_dependent_authentication = yes sender_dependent_relayhost_maps = hash:/etc/postfix/relayhost_map transport_maps = hash:/etc/...
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18 views

Postfix: reprocess mails placed in wrong inbox (/var/mail/nobody) due to misconfiguration?

Due to a misconfiguration of $mydestination and virtual alias maps, all my server mails were placed into /var/mail/nobody by postfix. Can I reprocess these mails via postfix and send them to the ...
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43 views

Postfix ignoring virtual alias in MySQL database, returns error “Unknown user”

I set up a Postfix email server over a year ago following this guide: https://www.howtoforge.com/virtual-users-and-domains-with-postfix-courier-mysql-and-squirrelmail-debian-wheezy. The server has ...
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38 views

Trouble setting up mail server(postfix, dovecot) on centos

I'm having trouble setting up my mail server, i have followed this tutorial: http://www.krizna.com/centos/setup-mail-server-centos-7/. Now i'm trying to send mails to my outlook adress, but i can't ...
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50 views

Migrate emails to new server but prevent Outlook from re-downloading them

I have a sendmail server that is nearing end-of-life. I need to move all email accounts to a new server (postfix), but I don't want Outlook users to re-download all their existing messages after the ...
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32 views

How do I eliminate the hostname from HELO greeting of postfix?

According to http://www.postfix.org/BASIC_CONFIGURATION_README.html, postfix should derive $myhostname if you set myorigin = just the domain name, however I haven't found that to be the case. I did ...
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1answer
19 views

Alternative postmaster address if first fails

I am using postfix to send status reports about my server to an external email address. If the delivery fails the postmaster is informed. It's address is defined in /etc/aliases with something like ...
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1answer
130 views

How do I get opendkim to sign emails?

I am running on a ubuntu 14.04 VPS and am having trouble getting opendkim to sign outgoing emails. Also, I do not understand the results from dig -x, and I'm not sure my VPS provider entered the rDNS ...
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61 views

postfix: how to generate a bounce

Is there a way to generate a bounce programmatically? The only thing I found is "-N" flag in sendmail wrapper and bounce_template_file configuration parameter: /usr/sbin/sendmail -N failure But for ...
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50 views

Piping Postfix messages to a script

I have googled and found many instances of people asking this same question, but none of the hits has helped me. Coming from qmail, I thought that Postfix would be easier. I have Postfix installed on ...
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1answer
11 views

Multi-Email Address Forwarding Not Working

I am using POSTFIX on my CentOS server box to do email forwarding. The goal is to be able to create some simple forwarding addresses for the multiple domains on this box to route mail to a single ...
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4 views

Configuring postfix to work with TLS

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

Postfix configuration: bypassing a relayhost under certain conditions

We have a simple email system that uses Postfix to forward on emails sent to our accounts to our gmail accounts. This is achieved through virtual_alias_maps in main.conf and a corresponding file that ...
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47 views

How to make Postfix chain multiple accounts in recipient_bcc_maps

recipient_bcc_maps works fine for 1 level of recipients but it does not chain multiple recipients. For example: # cat recipient_bcc_maps recipient1@example.com recipient2@example.com recipient2@...
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50 views

How to make Postfix to bcc of incoming mail when the mail is delivered to an alias

When you configure recipient_bcc_maps straightforward, it works fine. But when an email is delivered to an alias that is defined in virtual_alias_maps, which can be either a name alias or a domain ...
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53 views

Hold outgoing spam by header in postfix

I would like to hold outgoing spam emails by checking the X-Spam-Flag header. I tried with smtp_header_checks (/^X-Spam-Flag:\s+YES/ HOLD), but it doesn't allow HOLD. I don't want to discard it ...
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13 views

Is it possible to tell Postfix to keep full emails for (e.g.) a week after they are sent?

Our mail server was recently blacklisted because a web server was infected with a spamming virus. We discovered and blocked the guilty sender only after we started inspecting the message bodies of ...
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96 views

Configure Postfix to reject mails with invalid DKIM signature

I have configured Postfix to sign my mails using OpenDKIM. (I followed this tutorial.) Now I would like to configure Postfix to reject mails for domains that have DKIM configured and the mail lacks a ...
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1answer
41 views

postfix + dovecot configuration, no mails received

I'm trying to install a postfix + dovecot mail server on my own server and have trouble receiving mails. I followed this tutorial https://samhobbs.co.uk/2013/12/raspberry-pi-email-server-part-1-...
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69 views

Roundcube not sending email via smtps

I am running Roundcube 1.1.4 on Debian Jessie - it all works OK apart from sending emails via my SMTPS server (which normally works OK). I use self-signed certificates. No additional Roundcube plugins ...
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139 views

How can I prevent that an user sends mail like another user on Postfix?

I am running a Mail Server on CentOS 7. All programs and system are up to date. My Mail Transfer Agent is Postfix, and it uses Dovecot SASL to authenticate the users. In Postfix's configuration, my ...
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98 views

Building a local mail server using postfix + dovecot + apache + squirrelmail on ubutnu server 15.10

i followed this tutorial to setup the mail server : http://www.tecmint.com/setup-postfix-mail-server-in-ubuntu-debian/ I managed to install and configure all the softwares , at the end i can send ...
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20 views

External mail from windows get rejected, local mail works

I have linux server with working SMTP server (postfix)... (I can send emails to gmail when connected to it via ssh) But if I send through bmail in Windows i get this in linux mailq: BB986640FC9 ...
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332 views

Ubuntu postfix sendgrid unknown mail transport error

I have configured postfix similar to this one: "Recipient address rejected" when sending an email with sendgrid $ /etc/postfix/main.cf smtp_sasl_auth_enable = yes smtp_sasl_password_maps =...
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74 views

CentOS - Postfix rejects incoming mails

I have VPS with Centos 6 with Postfix, Exim and Dovecot. When I try to send mail from GMail to mail account from my server I receive following error in /var/log/maillog: Feb 3 13:36:29 mobilepro ...
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1answer
45 views

Giving each domain unique IPV6 address for posfix SMTP

Today I faced a problem after setting up postfix as my mailserver and sending e-mail to a gmail email, which responded me with the following message: Our system has detected that this ...
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1answer
211 views

How do I resolve postfix installation issues?

There is some problem with postfix. When i try to remove it so that i can reinstall: learner@juggernaut:~$ sudo apt-get remove postfix Reading package lists... Done Building dependency tree ...
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141 views

What are the potential and abilities of a MTA (postfix, exim, …)?

I'm trying to learn how to set a server using Postfix, this is a very complex craft and I can't grasp yet the full potential of this tool. I would need to know if it can do these actions : John Doe ...
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9 views

setting mx record on own domain

i have question about setting mx record. as i researched, mx record should be point A record that point actual remote address to connect. i am using amazon linux, and i installed postfix in my server(...
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47 views

postfix to send email from a client

I own a domain company.com. All employees in company have gmail accounts. The domain registrar already provides email forwarding, so if I were to send something to bob@company.com, it would be ...
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144 views

PostFix Issue When Sending Emails through Outlook

I also have the Relay access denied issue and it's really disturbing me. I can send and receive normally from the web mail. However, when I configure the email on [B]Outlook [/B]without using ...
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2answers
147 views

Am I an Open Mail relay? Cent OS with Postfix, Dovecot,

After some time I build up an E-Mail Server again. I looked up different tutorial to do it right. I did it right or at least I can send and receive E-Mails. The most important thing for me is that ...
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144 views

Centos 7 - i am unable to send emails using postfix

I am trying to send an email from postfix to gmail, but it only says that the network is unreachable i have ports 25, 465 and 587 open both on firewall-cmd and my router. I am not experienced with ...
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1answer
34 views

Is it possible to setup a Postfix-to-Postfix mail queue?

My ISP is pretty awesome in that they block all the interesting ports (80 and 25 especially), unless you're willing to pay $300/mo for a "business" tier. So I want to get around them. I have my own ...