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

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Avoiding Mail Server Inconvenience

We run our own web server (Apache on Ubuntu) for a bunch of non-commercial websites, but there was no mail transfer agent installed on it, since they are complex to configure and maintain. You need to ...
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21 views

ZIMBRA 8.5.1 : error: unsupported dictionary type: LMDB

Last Saturday, We did below things,after upgrading from 8.0.5 to 8.5.1. su zimbra echo smtp.DOMAIN.com UN:PW>/opt/zimbra/conf/relay_password postmap lmdb:/opt/zimbra/conf/relay_password postmap -q ...
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23 views

macosx: How to unblock SMTP port?

In /var/log/mail.log I see runs of time-out errors in quick succession, like this Dec 13 15:50:31 myserver postfix/smtp[2911]: connect to alt2.gmail-smtp-in.l.google.com[74.125.138.26]:25: Operation ...
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Postfix - relay issue on my end?

Maybe someone experienced more than me in Postfix can help me out a bit. mail.log:Dec 11 22:14:36 server596 postfix/smtp[31301]: 3A5BC17AC00D: to=<int@njsbw.com>, ...
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5 views

Postfix error: proxy-reject: END-OF-MESSAGE: 451

I installed mail server by using the fufix bash install script. I cannot send and receive messages. Keep getting this message in log: mail1 postfix/smtpd[25142]: proxy-reject: END-OF-MESSAGE: 451 ...
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10 views

postfix relayhost send as user@example.com

I have a working setup of a postfix installation, but because I have a dynamic IP, gmail refuses any messages I send from my server. I searched arround and found that with relayhost I can send ...
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11 views

How can I have Postfix add a header to all outgoing mail based on command?

I would want to have postfix to run the command: /usr/bin/hashcash -mXb 26 <RECIPIENT1> <RECIPIENT2> ... <RECIPIENTn> and add the output of this command as a header. How can this be ...
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8 views

msmtp complains no auth method found

msmtp output: <-- 220 example.com ESMTP Postfix (Ubuntu) --> EHLO example.com <-- 250-schemacs.com <-- 250-PIPELINING <-- 250-SIZE 10240000 <-- 250-VRFY <-- 250-ETRN <-- ...
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23 views

How can I set a conditional relay in Postfix?

We have Postfix setup to relay mail to our hosted Internet facing mail server. Is it possible to configure Postfix to relay mail differently based on the destination? We currently have it working so ...
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17 views

POSTFIX is possible to detect when mail was read

I have a problem that I need to check when in the morning the first mail of some account was read. We are using POSTFIX mail server and system is UBUNTU. is this possible?
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35 views

Multiple postfix instances one host

I have a server on which i need to add setup a second postfix configuration to send e-mail (doesn't have to receive) that's being sent in from a PHP web application that's hosted on the server aswell. ...
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23 views

How can I filter spam based on the return path in an email with clamav/amavis/spamassassin/postfix

I run an Ubuntu 12.04 server that hosts a few sites and has a handful of mail users. For email, I am using postfix/dovecot with clamav/amavis/spamassassin for anti-spam/virus. This works pretty well ...
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68 views

Postfix SMTP message being marked as SPAM by Gmail and Yahoo

I'm having a problem getting my low-volume of legitimate email messages through the SPAM filters of Gmail and Yahoo. I have followed Gmail's guide here: https://support.google.com/mail/answer/81126 ...
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24 views

postfix problems with pattern in virtual file

We are trying to forward all emails to a specific email address. I think everything is set up okay, such as 'main.cf' and 'virtual-regexp' files. If we put the following in the 'virtual' file, the ...
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51 views

Some mail from newly setup mailserver flagged spam by GMail

I have just setup a new mailserver using Postfix on CentOS 7, the machine serves as mx for two domains, domain1.com and domain2.com. The server's hostname is domain1.com and it has the correct PTR ...
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30 views

Limit postfix e-mail-address to only receive from one domain, discard everything else

we have a new copying machine in our office, and it is capable of fax per mail and print per mail. what i want to do is to configure postfix in a way that our copier is capable of sending anywhere (so ...
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196 views

Why does postfix give “lost connection after EHLO” error when Gmail tries to connect to my SMTP server?

I'm trying to setup my gmail account so that I can send emails that appear to come from another email address I own (myuser@mydomain.com). Instructions to do so are here. When I try to do it, it ...
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2answers
242 views

Postfix SMTP SSL config: Can't send email but can receive it with SSL

I am trying to finish configuring my postfix/dovecot mail server that sits behind my home's router/firewall. I'm on Mint/Ubuntu 12.04. I'm close. I can connect/retrieve emails via SSL but can only ...
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41 views

Postfix can send but not receive mail

I just finished following this tutorial to set up a postfix mail server on ubuntu 14.04: https://www.digitalocean.com/community/tutorials/how-to-install-and-setup-postfix-on-ubuntu-14-04 When I ...
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41 views

Postfix on CentOS - Cannot receive emails

I'm trying with no success to setup Postfix on my server so I need some help (first timer here). Basically I cannot receive emails from anywhere. If I send an email to myself or to another address ...
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126 views

Can't receive mail, but can send mail? Centos 6 Postfix/Dovecot

I followed this tutorial to setup my webmail on centos 6: https://www.rosehosting.com/blog/mailserver-with-virtual-users-and-domains-using-postfix-and-dovecot-on-a-centos-6-vps/ Everything is setup ...
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2answers
62 views

How to deal with mail senders failing on STARTTLS?

I try to use my mail server richtercloud.de for subscriptions to vger.kernel.org mailing lists. I set up postfix 2.11 running on Ubuntu 14.04 and sending and reception works. I set up postfix to ...
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25 views

Configuration step by step of Postfix with chroot with debian amd64

Please, I want to configure mailscanner with postfix, but in the documentation, they said "configure postfix with chroot", but i can't do it Is there any documentation that explain step by step for ...
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How to add new 'From' email id each time sending email using PostFix server

I am new to PostFix and have setup PostFix as a server recently. In the testing, PostFix is working fine and relaying the emails with 'From' email address stored in the PostFix credentials files likes ...
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49 views

I'm having an issue with all postfix mail being rejected with “relay access denied” - Centos 6.5, postfix 2.6.6

If I use smtpd_recipient_restrictions, everything gets rejected with "relay access denied". If I use smtpd_relay_restrictions, everything gets through and ignores the whitelist. Not sure what's up; ...
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302 views

Fatal error (bad field count) while configuring Postfix

I'm using this tutorial to configure a mail server using postfix, dovecot and mysql. While configuring Postfix I have to uncomment the following lines and then restart Postfix with service postfix ...
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63 views

dovecot WILDCARD SSL (certicate.crt, private.key, intermediate.crt) not working

I have installed dovecot and postfix and got it working, but when I change the ssl_cert_file, ssl_key_file and ssl_ca_file dovecot configuration to my WILDCARD SSL certificate (working on apache) it ...
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21 views

Postfix not working with non self signed SSL Certificate

I have installed postfix and generated a self signed SSL certificate, it was working, then, I tried to configure it to use my WILDCARD ssl Certificate that is configured to apache2. Then I started ...
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20 views

Postfix bcc to ldap address

I am using Postfix with AD, and I want to send a copy of every email to their manager. Therefore I have these entries: cn: staff1 mail: staff1@company.com manager: ...
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90 views

sysvinit postfix startup script - only called with “status” argument

I'm having a problem with postfix not starting up on boot. boot.log doesn't show any information whatsoever. Starting the postfix service afterwards works as expected. I added debug information to ...
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79 views

Duplicate and relay mail from postfix

We currently use Google Mail for our teams email. We want to move to a self-hosted email server. Some of our team members prefer using Google Mails interface and asked if we could continue having ...
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32 views

Postfix allows unauthenticated users to send “local” mail

I noticed that my Postfix setup allows to send mails without authentication to recipients within my domain. According to this question, it seems that anyone can send mails to my domain pretending to ...
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71 views

Email Issue - “On Behalf Of Blackhole”

I am experiencing an odd email issue that I haven't been able to find any answers to. I have a Ubuntu server setup with postfix that uses mailgun to send emails. I'm not using the mailgun API, just ...
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53 views

Postfix auth with username containing an at sign?

How can I configure Postfix so that a user sending an email can authenticate with a full email address containing an at sign (@) and a TLD, such as "info@mydomain.com"? Currently my "info" account is ...
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44 views

user's mail server credentials for squid proxy

I have mail(virtual server, xen virtualization) and proxy servers on different physical machines. I have to configure squid proxy in such a way that users should be able to authenticate proxy using ...
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28 views

Server (with Postfix) is forwarding my email using a .forward file, is it still saved on the server?

I'm using Postfix on my server but not really using that for much because I have a .forward file setup for all accounts which forwards the email to someplace else, and never sending through the ...
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176 views

Linux/Postfix with relay: I can openssl to relay host on port 465, but postfix does not seem to connect

This looks like a tough one to me: I'm configuring postfix on my local home server running ubuntu server 14.04 LTS I was able to send outgoing mail through my relayhost on port 26, everything worked ...
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100 views

Detect spambot on ubuntu 12 TLS

Recently I discovered in my mail log that there is an enormous amount of spam being sent from my home server. I am running no websites, just zpanel. I closed down all the ports and am monitoring the ...
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132 views

postfix doesn't work with IP as hostname

Using Ubuntu 14.04 x64 I had a working installation of Postfix which was handy for sending emails in my terminal, but I had an issue with an application that was critical for my workflow. In order ...
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2k views

Postfix Relay Access Denied When Sending To Gmail With Telnet

I have postfix and dovecot setup to deal with mail for my domain. imap appears to work ok when reading local mail but when i try to send an email using telnet with localhost and the smtp port it gives ...
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54 views

Sending mails and narrowing what script does it

I'm using a very old Ubuntu server that was some time ago a mail server which was infected. Sadly there is a running web page on that server. Some script/page/malware is trying to send a lot of spam - ...
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58 views

Strange emails in postfix queue

Currently I am not sending any emails, I have postfix and dovecot installed but in the in the postfix mail queue I see strange emails almost every minute, i dont know from where is this spam ...
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391 views

Mailx is is not working

I have been trying to send emails throw Linux using echo "hi abhijeet2" | mailx -v Admin abhijeet123@gmail.com Whic works fine on other linux system ,but not working my system. I have tried to ...
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244 views

Postfix to send all mail to /dev/null except one address (alias)

My postfix server is working on a particular domain name through a relay, so it's like that: Client send to abs@subdomain.domain.com -> domain.com production mail server -> internal mail server on ...
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32 views

postfix virtual redirect not working properly

I setup postfix on one of my server to redirect incoming mails via virtual.db . I already changed my main.cf and added "virtual_alias_domains" & "virtual_alias_maps" my "virtual" file looks like ...
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56 views

Local SMTP Server — prevent spam flag?

I opened up port 25 on my router, so now I can use sendmail to send email. However, the emails I send are being marked as spam by my personal gmail account (understandably). The "from" field defaults ...
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67 views

Postfix mail server acting as an open relay

I'm trying to get postfix to work with mail clients (thunderbird / outlook), but the only way I can achieve it at the moment is by turning the mail server into an open relay, which is very bad, ...
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95 views

Postfix configuration: how to properly setup local addresses

I am configuring Postfix and SOGo and when I trying to sent email from one local user to another I got the status bounced error, unknown user: Error log: Jun 9 09:26:28 mail postfix/local[24266]: ...
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1k views

Google Mail blocking emails sent by postfix

I have set up an email server, but I have a problem with sending mails to Gmail. This is my /var/log/mail.log: Jun 4 20:49:26 jenny postfix/qmgr[6064]: 4CBDB67482: from=<mail@[...]>, ...
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140 views

Ubuntu + SSL ports + AVAST

I have an interesting problem with communication via standard SSL ports. Fresh installed Ubuntu 14.04 server + Postfix + Dovecot, SASL authentication provided by Dovecot, self-signed certificate ...