Postfix is Wietse Venema's mail server that started life at IBM research as an alternative to the widely-used Sendmail program.

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2
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1answer
20 views

Postfix: error while loading shared libraries: libmysqlclient.so.16 [on hold]

postfix: error while loading shared libraries: libmysqlclient.so.16: cannot open shared object file: No such file or directory [root@localhost ~]# mysql -uroot -p*** -e "select version();" ...
3
votes
1answer
32 views

how to adjust the boot sequence using systemd

I need to send email using postfix as server once wifi has received IP address (based on dhcpcd). It seems that systemd by default boot postfix before wifi (wlan0) is ready. The consequence associated ...
3
votes
2answers
75 views

Install mdadm without postfix in ubuntu trusty

I want to build a RAID system on top of Ubuntu Trusty. When I do apt-get install mdadm A screen pop up asking me to configure postfix. Because I will run this installation in automation script. Is ...
1
vote
1answer
9 views

Include another file in Postfix proxy configuration

I am trying to configure Postfix with FreeIPA and need to provide the bind DN, base DN, password, servers etc. for LDAP proxies. These need to go into four different configuration files, making it a ...
3
votes
0answers
13 views

Spam in Zimbra OpenRelay

First apologize me for the grammar, english isn't my native language. The problem I have is users from our local zimbra mail are getting spam messages from other email addresses who don't exist, like ...
1
vote
1answer
8 views

postfix&dovecot — adding some spam filter

I have setup my SMTP server (on a Linux/Ubuntu 15.04 VPS rented at OVH) according to http://www.binarytides.com/install-postfix-dovecot-debian/ (so there is no traditional user on the box; hence it ...
1
vote
1answer
53 views

is my newly setup mail server on my laptop hacked?

I have just installed postfix on Arch Linux. I am following Arch wiki to set aliases to set following line in /etc/postfix/aliases root: edward after this I ran postalias /etc/postfix/aliases and ...
1
vote
1answer
43 views

Why postfix doesn't verify the sender is who they say they are using reverse dns, SPF or DMARC?

Making sure postfix isn't an open relay, I tried to send a mail from my mail address towards my mail address, the telnet log goes like this: Resolving hostname... Connecting... SMTP -> FROM ...
-4
votes
1answer
26 views

Postfix can not send from Mydomain - only to third party domains

So I have setup an Ubuntu server and want to use postfix in order to sendmail via php. The server host: example.com When the server sends an email to anything@example.com, I get an error. If sending ...
0
votes
2answers
31 views

Does postfix using mail command report if an email was unable to be sent to an address?

I am writing a program that will be sending external emails using postfix with the mail -s command and I need to verify that the email was sent to the specified address. In which case, I am curious ...
3
votes
2answers
97 views

(Raspian) DHCP startup race conditions - lots of service failures at startup (no DNS for ~5-10 seconds)

(Edit: This applies to much more than postfix; it's just where I noticed/debugged it) I've installed postfix, but when it starts up and creates its chroot, it gets an empty copy of /etc/resolv.conf ...
2
votes
1answer
54 views

Why does postfix copy /etc/resolv.conf to its chroot too early, causing DNS failures?

Edit: For anyone else having this problem, this question was actually was very badly asked/understood and a better description of the problem (and the correct solution) can be found here. I'm trying ...
1
vote
1answer
29 views

How do I debug email delivery delays?

In order to get notified about some stuff going on on a server, I use simple mailutils command executed @hourly by cron: cat $file | mail -s "Subject" $receivers where $receivers is a list of a few ...
3
votes
0answers
26 views

Postfix sending hostname needs to be different for different domains

We have an application that generates outbound email for a range of domains. The app servers connect to a part of Postfix servers in a DMZ and these then forward on to filtering in a second DMZ. We ...
4
votes
2answers
77 views

OS X Postfix no TLS found

I'm working on OSX El Capitan. About week ago everything worked fine, but then I changed my gmail password and now I can't send emails any more. Additional configuration for /etc/postfix/main.cf is: ...
2
votes
2answers
97 views

Sending HTML using mailx with postfix 2.6.6 and centOS 6.4 [duplicate]

I'm trying to send an HTML email from our CentOS server to users. In the long run I'll be building a COBOL program that runs the command to send reports to the user. Here are a few details. ...
4
votes
2answers
56 views

Is it possible to redirect root email to axigen internal e-mail?

For a few month I've been using Axigen webmail as my main e-mail server. For the last month I was looking for a way of redirecting my root e-mail, as well as my crontab outputs into an internal ...
1
vote
1answer
67 views

Postfix using external smtp server problem

I am not sure if this is the right stack exchange for my question, there are multiple stack exchange were my question might fit. I have setup my postfix configuration to send my emails through an ...
3
votes
2answers
67 views

Forward Postfix mail based on regexp

We are buildng a ticket system using PHP. We have now bumped into the problem of identifying customer replies. Placing an id in the subject will not do because users could remove this. Posting an id ...
4
votes
2answers
74 views

Change user maildir to custom location upon creation of the user

I use Ubuntu 14.04.3 LTS . How to change the location of the Mailbox /home/user/Maildir/ to /Location/Mail/? I dont have to create home directory for that user. I did some changes in the ...
1
vote
2answers
77 views

Postfix: Remove References to Server Software

Every time my postfix servers sent emails at the destination the emails headers include the following: by suppaserver.example.dev (Postfix) with ESMTPSA id 79D412E1A3A How can I remove the ...
1
vote
1answer
69 views

Postfix: Users impersonating other users at same domain

I've a postfix email server running and everything was fine... well until someone decided to impersonate other users. The current situation is: user1@mydomain.dev can send email with a faked from ...
0
votes
0answers
47 views

Mark emails on my mail server as read

I have a Virtual Private Server, running a mail server for my domain. I use postfix and dovecot. I'm using IMAP. On my MacBook, I can retrieve my mails using the default app Mail. However, every time ...
1
vote
0answers
12 views

postfix forward throttling

I have some problem with throttling for my mail system. main.cf initial_destination_concurrency = 1 default_destination_concurrency_limit = 1 default_destination_recipient_limit = 2 ...
3
votes
2answers
40 views

Control character handling in cron/mailx

I have a cron job which runs a long script producing lots of output. Some of the output is lines delimited by single carriage returns; when run from the command line, these make the successive lines ...
1
vote
0answers
47 views

Scan outgoing Postfix email for spam with Spamassassin

Is there a way to filter outgoing Postfix email for spam possibly with Spamassassin? I found this answer about how to do it with Amavis but it's terribly outdated and not very well explained.
2
votes
1answer
286 views

postfix log messages: RBL lookup error: Host or domain name not found

I'm finding quite a few of these types of messages in my postfix log: 17:40:55 smtpd: warning: 34.77.82.185.b.barracudacentral.org: RBL lookup error: Host or domain name not found. Name service error ...
2
votes
0answers
55 views

Postfix: Outgoing Email Filter + Deliver sent email to a folder

I'm running a filter for incoming email on Postfix that basically sends the email through SpamAssassin and then delivers it to the user by using dovecot-lda. This is happening by editing Postfix's ...
2
votes
1answer
70 views

Mutt and Postfix : relay access denied

I try to send mail with Mutt through my own mail server. My mail server run Postfix and Dovecot. I configured it by following this tutorial. I can send / receive email on my server with Gnome ...
1
vote
1answer
58 views

Serve mail for multiple domains on a single server?

I am running a Debian Jessie 8.1 server with a functioning postfix, dovecot, and suirrelmail/rainloop. I have multiple domains on the server. The main server domain is set via example.com.vhost ...
1
vote
1answer
114 views

Postfix virtual aliases & domains?

(I am a Postfix newbie, was using Exim -which I don't master well- poorly till a recent system update on my VPS; but I am using Linux since 1995 and Debian since end of previous century on my home ...
3
votes
0answers
75 views

Postfix rewriting subject for specific addresses

I would like to add a tag to all email messages sent to a particular address. I have tried to copy examples from the web, but can't seem to get it working. Here's what I've done so far: Add to ...
0
votes
0answers
36 views

Problem in sending email from postfix

I have followed an online guide to install and configure postfix with dovecot in CentOS 6. Now I can login on the POP3 server from Thunderbird but when I want to send email the following error ...
3
votes
1answer
280 views

Adding reply-to header for simple postfix mailing list

I have a postfix with the following in /etc/postfix/main.cf: virtual_alias_domains = hash:/etc/postfix/mydomains virtual_alias_maps = hash:/etc/postfix/virtual These specify the domains set up for ...
1
vote
0answers
81 views

Hosting Dovecot and Postfix Behind nginx?

So I'm looking at setting up postfix and dovecot on a server that is currently hosting some web-sites via nginx, and I've stumbled upon the mail {} configuration option for nginx, but I'm having a ...
7
votes
2answers
387 views

Postfix + SpamAssassin: Incoming mail headers changes

I made a Postfix + SpamAssassin setup following the instructions most websites recommend for this kind os setup. Basically I edited my master.cf to add: smtp inet n - - - ...
2
votes
1answer
24 views

Postfix database unreachable behaviour

I have a server running postfix and dovecot with a local mysql database to store virtual domains and users. I'm considering to move the database to another server and perhaps switch to using ldap ...
0
votes
1answer
30 views

All emails are going to spam

So, i purchased a dedicated server just over a month ago and its running CentOS (Plesk). Every email that is sent out to gmail accounts are going to spam, and its not happening to any other email ...
3
votes
1answer
95 views

What is the correct helo for a smtp server that does not receive mail and does not have a FQDN?

What is the legal and correct helo for my SMTP server. Out going email only. Behind a NAT with no inbound ports open. SMTP server does not have a FQDN. Send mail for 2 different domains We are a ...
1
vote
0answers
75 views

Authentication failure with postfix and sasl using sasldb

I'm really not sure what my issue is. I've checked several guides, and I am sure I have set this up correctly, including config fails, restarting the service, permissions etc. OS is Ubuntu Server. ...
4
votes
1answer
808 views

Postfix mail logs keep showing “NIS domain not set”

I just set up a new email server using Postfix and Dovecot. I've been troubleshooting, and this line keeps appearing in my logs (specifically, mail.info and mail.log). What is a NIS domain, and how do ...
4
votes
2answers
120 views

How to hold mail for only certain users with postfix?

I would like to hold all outgoing email for certain users (all users except a few) for a set period of time, or until I approve (even if that means changing a config and restarting the service). Users ...
1
vote
0answers
132 views

Postfix cannot start but dovecot is ok

My postfix service cannot start. Here is message: Job for postfix.service failed. See 'systemctl status postfix.service' and 'journalctl -xn' for details. And here is service status: ...
1
vote
2answers
167 views

Fetchmail with local Postfix on Home-Server

a small question... I have a fully configured postfix server which have a few domains, few users, and much more. Then I have a smart host which receives all mails and send all mails. For example ...
4
votes
1answer
93 views

Add warning to emails received by Postfix without TLS

Is it possible with Postfix to add a warning to all emails received over a cleartext (non-TLS) connection? For example modifying the subject and/or adding a custom header.
0
votes
0answers
32 views

Postfix: enable authentication through port 25

I would like to configure postfix so that authorized devices can only send email through port 25. By default this is not so. Postfix currently relays emails through 587 TLS. My plan is to use port 25 ...
0
votes
0answers
19 views

Hosting email for multiple domains on the same server? [duplicate]

I have a single server with dovecot and postfix installed to handle email. If i create a user on the OS (centos) i can then use this user to log into any email client and send/receive emails. The ...
0
votes
1answer
164 views

Every email that I receive gets sent to root@example.com (Postfix on CentOS)

I've got a bit of a strange problem going on. It seems that all emails I receive never make it to my actual inbox. They go to the root email. (in my case this is root@dougbeney.com) Here is my ...
2
votes
1answer
312 views

I can send mail but can't receive it (CentOS with Postfix)

I followed this tutorial and was able to create a mail account that can be configured in an email client. The problem is that I can't receive any messages to my inbox BUT I can send messages ...
2
votes
1answer
82 views

Can't send local mail message between users on linux

In http://unix.stackexchange.com/a/21336/99621 it says that if you do echo 'body' | mail -s 'subject' myuser It will send a mail message to the myuser linux account on the local system that this ...