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

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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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1answer
104 views

Changing X-Original-To: header in postfix

I am using a virtual file with my postfix to redirect all mails coming to my domain to a user My virtual entry looks like this @domain.com root Now the X-Original-TO header shows root@domain.com. ...
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1answer
10 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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1answer
2k views

PHP mail() function not working in Mac OS X

I know this question has been asked many times and people use to give many solutions. I have followed almost all the possibilities which I come across after investigating on it. but nothing worked ...
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1answer
2k views

Email test deferred (mail transport unavailable) with ClamAV

I'm trying to set up a simple new mail server; when I send a test email to the server the email is getting hung up during delivery (user mapping is found) and the email is never found in ...
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10 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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4 views

Postfix allow SASL-authenticated users to send from any IP address [migrated]

I understand that I need SMTP on port 25 to receive email, but I do not want this to be a relay port. Instead I would port 587 to be used for registered (SASL-authenticated) users to relay email from ...
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19 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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26 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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14 views

t-online.de blacklist “host refused to talk to me” (BL) [migrated]

I got following error message for several days, as my server tried to send a message to an emailadress at t-online.de: host mx02.t-online.de[194.25.134.9] refused to talk to me: 554 IP=xx.xx.xx.xx - ...
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83 views

Google Mail blocking e-Mails sent by postfix

I have set up an e-Mail 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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1answer
60 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 ...
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1answer
3k views

Example of fail2ban configuration to ban servers spamming my postfix server?

I have a small mail server at home and quite a restrictive filtering rules. I use logwatch and could see that 80 to 90% connections are rejected by my restrictive filtering rules. Most rejection ...
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28 views

Ubuntu - Change postfix domain

I used this https://www.digitalocean.com/community/articles/how-to-set-up-a-postfix-e-mail-server-with-dovecot and this ...
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37 views

Configuring email in PHP for Elgg using postfix

I am trying to setup PHP for running Elgg. I have PHP 5.5 installed in a Ubuntu 14.04 VirtualBox VM. I need to complete the following requirement (elgg requirements page) : Proper configuration and ...
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1answer
89 views

Can't send email to the internet from Postfix mail server. (Relay access denied)

I have a mail server running Postfix in my LAN with which I can send and receive emails in my LAN and send from the WAN to the LAN. I can't send from the LAN to the WAN though. I am trying to use my ...
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1answer
20 views

Postfix corrupting Japanese characters

I'm having a problem with certain Japanese characters being corrupted when sent by my MTA, Postfix. I've done some trial and error sending the same message from approx 7 different servers running ...
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1answer
40 views

Configuring Postfix as SMTP relay (only)

I have a Postfix 2.5.1 on a Debian 4.0 PPC server. I intend to use this as an SMTP relay for outgoing email from my mobile phone (as my phone service provider recently dropped their SMTP server). The ...
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1answer
15 views

Postfix Relay Based on Recepient

What is the best practice when one has to implement this sort of ruleset in postfix: Email sent to a@example.com, b@example.com, etc ought to be relayed to smtp.a.example.com. Email sent to everyone ...
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1answer
35 views

Postfix virtual users without database [closed]

I've made several attempts to setup a mail server. Each time, I find a tutorial to follow, and each time I get frustrated with the tutorial for one of the following reasons: The tutorial doesn't ...
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3answers
1k views

Unable to receive emails using Postfix

I've set up Postfix on a VPS running Centos 6, and I can access webmail using Squirrel Mail fine. But when I send or receive emails from my Gmail and other personal account I don't receive them on the ...
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2answers
897 views

Monitor Postfix outgoing mail delivery

I'm using GNU Mailman with Postfix to run a mailing list, and would like to monitor the delivery of outgoing mail, that is: for each mail sent from the list, check whether a 250 (OK) message was ...
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9 views

Unable to start Postfix from Virtualmin

I have a probleblem with starting postfix from Virtualmin, all email functions are disabled on my VPS. What should I do in order to re-enable it?
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1answer
84 views

Roundcube login error

Using postfix, courier-imap, courier-pop, roundcube I get this error when trying to login through the roundcube web login: [08-Apr-2014 11:44:04 +0000]: IMAP Error: Login failed for user@domain.com ...
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1answer
168 views

Postfix: which process is attempting to send to example.com?

Here is the maillog extract: May 15 10:20:41 nucleus postfix/smtp[4754]: connect to example.com[192.0.43.10]:25: Connection timed out May 15 10:20:41 nucleus postfix/smtp[4755]: connect to ...
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1answer
106 views

Postfix allows unauthenticated users to send emails

Hey I set up Postfix to use cyrus SASL implantation and I'm able to login and send emails, but I can still telnet on port 25 and send mails even if I'm not authenticated, which I whish to deny. ...
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1answer
124 views

Not able to send mail via Ubuntu VPS

I'm having a Ubuntu VPs with zpanel isntalled on it. There is something wrong going with the mail. Im not not able to receive the mails from my contact form on my wordpress site ( the site is hosted ...
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1answer
46 views

Domain [ Understanding ] issue when creating a Linux email server

Ok, here goes my paradoxical question. For about 1 year into my hobby-ish career, I used to buy my domains and a hosting package from Reseller Club. I purchased their " shared hosting " plan and ...
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24 views

Solving issue of similar user email account

I am using a VPS, CentOs 6.5, PostFix, Dovecot for hosting multiple email from different domains in my server. Which means, 5 different websites host their emails together. ex: info@some-company.com ...
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21 views

Client computer blocked by postfix

I have been trying to connect from a Windows client computer to a Postfix server running on a Suse Linux Enterprise 2012 SP3 but it has been completely impossible. Connection is not possible either ...
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1answer
34 views

unable to delete/mark-read emails

I think there is something wrong with the folder-path configuration, but I am unaware how to solve this. I can send/recieve mails over IMAP with my mail applications, but no emails will go marked as ...
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1answer
14 views

Postfix with two vhosts

I've got this problem: I installed postfix (v. 2.10.2) on Ubuntu 13.04. I've got there two vhosts with two different sites, for example: aaa.com and bbb.com. Got those domains connected with google ...
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1answer
115 views

What permissions on /var/mail directory?

I've been suffering a permission problem in Postfix/Dovecot for a couple of days now. The setup is using virtual domains and users, so the path to user's home is /var/mail/<domain>/<user>; ...
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25 views

Postfix/Courier - list known email accounts or addresses

I'm trying to set up an IMAP server. Its a new server in a migration. I thought I completed all the steps from Virtual mailboxes with courier-imap and postfix, but apparently I have missed something. ...
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1answer
145 views

Can postfix forward all outbound email to a relayhost except for local user-to-user email?

On my home Ubuntu box, postfix is configured to relay all outgoing email to outgoing.verizon.net. Unfortunately this includes local user-to-user email (e.g., from local cron jobs to me, or from me to ...
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63 views

Postfix: Block all inbound and outbound access but allow all for one user

How can I restrict access for an internal domain but allow all access for one user, say the admin of a domain? All users should be blocked from communicating outbound and no external domain may ...
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3answers
312 views

Debian sendmail Cannot write

I had a working sendmail configuration on my debian server, i tried to put a postfix to receive email but abandoned, remove postfix, re install sendmail but nothing work anymore :( here is my ...
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56 views

Blocking or filtering chinese spam using postfix

My mail server runs postfix, spamassassin, amavis and sieve. Using a combination of any of these, is it possible to block or tag any mail I receive that is written in non-"English" characters? I.e ...
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52 views

Ubuntu Server 13.10 | Postfix 2.10.2 does not read smtpd.conf

I would like that my Postfix accepts only LOGIN and PLAIN authentication methods (or methods as first). I did following changes in configurations files. /etc/postfix/main.conf Code: # SASL ...
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1answer
112 views

Mailman + Postfix: unknown user

I set up postfix + dovecot and know that I want to have mailing lists I decided to install mailman. Everything is working except that I cannot send emails to my mailing list (and this is quite ...
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1answer
176 views

Postfix is Sending Spam [closed]

I have an Ubuntu 12.04 server, hosted on AWS, that powers a dozen WordPress installations using Nginx and php5-fpm. The problem just began one day. My server was down. Panic! Whenever I turned it on ...
2
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1answer
61 views

Bulk-deleting inbox mails managed by POSTFIX

Had an issue several hours ago with a client mail account, which got compromised. As a result, he had hundreds of thousands of spam queued in postfix, which lead to several issues. Everything's fixed ...
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765 views

Postfix: SMTP, use port 587 rather than 465

I have set up a mail server on AWS EC2 using the instructions from Flurdy: http://flurdy.com/docs/postfix/ it has mostly gone well. My issue is that I would prefer to use SMTP port 587 with TLS ...
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0answers
69 views

Issues with Z-Push configuration

I've got a mail server that I set up with a Postfix / Dovecot setup. I tried to install Z-Push as well, and everything seems to be working appropriately, but I'm having issues from specific devices. ...
0
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1answer
27 views

Disabling sentbox in postfix over Squirrelmail

I have installed POSTFIX over Squirrelmail on CentOS Linux... The services I have ran are: service httpd service ssl service mysql service postfix service saslauthd service dovecot But I want to ...
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1answer
77 views

Mixing virtual forwards and virtual mailboxes in postfix

I am setting up a postfix server. The first thing I tried was to deliver mail to virtual mailboxes: main.cf [..] virtual_mailbox_domains = /etc/postfix/virtual_domains virtual_mailbox_base = ...
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1answer
95 views

Postfix: relay mail to smart host for specifc users

Currently i have a VPS that has a host of email accounts on for several domains. most are simple and have all local mailboxes. but i have one user that wants to have a hosted exchange account but ...
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78 views

How to send mail from multiple domains in postfix?

I recently installed Webmin, Postfix, and Dovecot on a fresh Debian Wheezy system. Everything is working fine, except I'd like to know how I can configure Postfix to not only receive but also send ...
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74 views

Email Spoofing - Bounce back messages

A client of mine (onto my mail server) receive back some bounces for mails that he haven't never sended to non-existent addresses. Of course, inspecting the header, the outgoing server isn't mine. I ...
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1answer
49 views

Understanding Postfix and Courier IMAP

I'm setting up my own mail server, and I'm very new at this... and I'm getting lost. I need your help in determining some parameters the way I know them already, because the configuration is huge. ...