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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Postfix: restrict all external access but allow for only mynetworks

How can I restrict access for an internal domain but allow all access for me the administrator? All users should be blocked from communicating outbound and no external domain may contact them, but I ...
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2answers
3k views

My Postfix installation is sending out spam; how to stop it?

Since a few days, my web/mailserver (centos 6.4) is sending out spammails by the bunch, and only stopping the postfix service is putting an end to it. SMPT is set up to only accept connections over ...
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1answer
160 views

Block local (unix) users from sending mail

Is there a way to block a local/unix user (or a list of local users) from sending mails via mail command (or maybe even in postfix, which is the MTA I have).
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1answer
1k views

SMTP issues - unable to connect : CentOS 6.5, Postfix, Dovecot, MySQL

I'm trying to setup an email server on a CentOS system with Postfix, Dovecot and MySQL. I'm following this article for an Ubuntu system: ...
2
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1answer
277 views

How do postfix and mailx interact with mbox locking?

If postfix is setup as the MTA using its virtual transport to deliver mail to a local mbox file (and handling delivery of outgoing messages), and mailx is the MUA, being used on that same computer for ...
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1answer
141 views

Create a Filter for Postfix on Virtual Mails

This is what I am trying to do: I have a server using Postfix on a Ubuntu precise 64bits and I have a table list of emails in /etc/postfix/virtual, like this: artz@mydomain.com artz@gmail.com ...
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1answer
24 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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3answers
859 views

How to install postfix for sending mails to admin only?

I have a VPS running Ubuntu 13.10 on Digital Ocean. I'd like to install postfix on the server, but I want it to be able to send e-mails only to my e-mail address whenever a system message wants to be ...
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1answer
52 views

How to get list of members subscribed to a list - Mailman

I have an Ubuntu server with Postfix and the Mailman list manager. My server stopped working, so I need to find a way to list the emails registered on the list of the Mailman. Note: I was able to ...
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1answer
68 views

Routing an Email from my server

I am a C# programmer and doing an internship as a programmer, where i have to work with linux, which I've never done before. I have installed and configured postfix successfully on a Linux server ...
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3answers
753 views

Postfix, SMTP Server, PHPMailer

I have an PHP Forum (vanilla forums) and for its registration emails I installed Postfix. Now As I figured it out, vanilla forums uses PHPMailer for email sending procedure. Now my questions are: ...
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253 views

Cannot configure Postfix to receive mail

I try to configure Postfix on CentOs 6. I can send mails from the server just fine, but cannot receive. The Delivery Status Notification that I get is: The error that the other server returned was: ...
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1answer
57 views

How to identify faked mail origin?

Today while setting up a mail server using postfix, I practiced to use sender_canonical_maps option, and noticed that it can change outgoing mail "sender" to appear like someone else. When Gmail ...
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160 views

Mail queue keep growing

My server keeps running short on inodes due the mail queue getting crazy. First, I assumed I had postfix not configured properly, so I switched it off. But, it happened again, last time I did it I had ...
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98 views

How can I configure postfix to send mail from my domain?

I currently have a VPS set up with postfix and dovecot, running on a mail server located at mail.noelforte.com. The setup works fine for receiving mail, as whenever mail is sent to @noelforte.com, the ...
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2answers
451 views

Why access file is being ignored by Postfix?

I have installed Postfix, I can send mails between local users as expected, but I would try to limit the access of a particular user to the server. I edited the /etc/postfix/access file in this way: ...
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1answer
2k views

Why I can't send mail to remote mailbox?

I have installed Postfix on my CentOS machine. I can nicely send mails to local accounts with mutt, but when I try to send one to a remote mail like myactualmail@gmail.com, I cannot understand why I ...
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30 views

bind9 problem with mail server address

I had installed postfix but since I didn't needed it anymore I removed it. So now the dns is broken and every time I type localhost:8080 in my address bar the browser redirects me to ...
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85 views

Postfix mail how to debug transmission to mail handling agent

I have a postfix server running on Ubuntu (and Debian previously). The server is configured to read users and groups from an OpenLDAP server and delivers mail first the spam filter and then to a ...
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246 views

Postfix not responding to telnet

I am doing a Postfix installation on CentOS 6.5 I can't get # telnet localhost 25 to do more than this: Trying ::1... Connected to localhost. Escape character is '^]'. EHLO ^] telnet> quit ...
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1answer
65 views

Mail delivery problems

Once upon a time there was a server. Lets call it zzz.com, running Ubuntu LTS 10. Then, domain owner decided to create his corporate mail via Google Apps, and created account username@zzz.com. ...
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2answers
826 views

Configure Postfix to Relay and Login From External Machine

I hope someone can offer me some assistance with this, its driving me bonkers. There maybe a hole in my understanding on how this should work, so be gentle with me. I have a Crunchbang Debian LAMP ...
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1answer
93 views

Mail server broken my LAMP installation

I was installing mail server, postfix/sendmail I suppose. Then I had no need to use it anymore so I removed it. But now when I type localhost in my browser it redirects me to https://mail.example.com. ...
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2answers
213 views

Where do uncaught local emails go?

Suppose I run - mail goldfish There is no such account on the system and no such aliases defined, where would the mail go? How do I see a list of such mails?
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1answer
127 views

Mail Server Setup, MX Records, and Hostnames?

I'm a bit confused how mail servers work, and the process of setting them up. Say I have an domain called example.com, and I have an A record for it. I'll be using postfix/dovecot for this setup along ...
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1answer
227 views

Sending mail to an external server?

I'm currently experimenting with working with Outlook.com for an email server, and have MX records set up to point there and the like. How can I configure systems like postfix to use external servers ...
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375 views

Problem compiling postfix 2.9 on Archlinux

I decided to do a mail server on Linux (postfix, Dovecot, etc.). Therefore, I decided to begin with compiling postfix 2.9 on Archlinux. I need support for SSL, SASL and PCRE so I'm compiling like ...
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3answers
339 views

postfix: different file name format for Maildir messages

I am using postfix with maildir format. The filenames of messages stored in maildir look something like this: 1386021659.27745_1.alpha:2,S I understand the first part is epoch time, not sure about ...
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1answer
142 views

Linking the `mail` and `sendmail` commands to Dovecot and Postfix

I have recently set up my mail server with Debian 7.2 (Wheezy), Dovecot, and Postfix, as described in this guide. This is all working fine, and I have installed and configured Roundcube and ...
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1answer
68 views

Postfix Masquarade Name *and* Email address

At the moment, I have a RHEL6 monitoring server that sends out emails with postfix. Originally it was sending them out as user@host.localhost. I've used the mapping file /etc/postfix/generic to get ...
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263 views

Sending emails from AutoMySQLBackup from Linux Mint

I have set AutoMySQLBackup on a Linux Mint machine and I want to have the backups sent to an email, but I cannot make it work. I'm new to Linux environment and don't understand it very much. I ...
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2answers
71 views

Local mail delivery not working

We are using RHEL 6.1 server. We need to send a mail from server to local domain (tcs.com). we are using mail command for this purpose. [bsoauser@hsluabsoa ~]$ echo "hi" | mail -s "test" ...
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170 views

How to migrate from Microsoft Exchange to Postfix, Dovecot, z-push, etc

After learning how to setup email on a Linux system, are there guides on how to migrate from Microsoft Exchange to Postfix, Dovecot, z-push, etc... ?
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86 views

postfix archive specific emails

I would like to know if its possible to archive specific emails based on the /Subject:/ for example if I receive an email with "Website Support" it will archive it in "Support".. is this possible?
2
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1answer
789 views

Mail forward: 550 5.7.1 Anonymous client does not have permissions to send as this sender

I want to install a small mailing list that forwards mails related to a specific project to all project members. So, lets say there are two members in that project userA@mailA.tld and userB@mailB.tld, ...
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221 views

php Mails not send with in domain

My setup : Our current server 90.0.0.50 [example] which is containing domain testdom.com. testdom.com's MX record points to Google mail. Due to some issues we need to host our domain on some other ...
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260 views

Configure Postfix to send emails “via” a server

This is a question related to postfix and WordPress (but is more of a postfix question). To give some background, on a professional WordPress host (like WP Engine) when I receive WordPress Mail ...
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1answer
49 views

New Server: What things to take care of when setting up a webserver to host multiple websites?

I am setting up my first webserver. On this machine, I want to run a couple of websites. Let xyz.com and abc.com and they will not be on seperate virtual machines. I have a few queries: What should ...
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69 views

How come the postfix user can't even read its own files?

I have a Postfix configuration file. Let's assume it's named /etc/postfix/somefile.cf. I have run the following command as root to change ownership of the file to the postfix (105) user: ...
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118 views

Postfix, postges courier-imap / relay reject error on gentoo

I followed a guide to put together a server https://wiki.gentoo.org/wiki/Complete_Virtual_Mail_Server it went smooth with no real headaches. First domain works like a champ but adding a second domain, ...
2
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1answer
115 views

Notify on email sent - Postfix

I have a small postfix server, on a Linux server (Arch Linux) mainly used as a http server. I use postfix to send database backups and notifications of my web sites. To avoid spamming, I'd like to ...
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1answer
221 views

postfix configuration to verify all recipients

I have a mail server that should receive all mails, even if no user is existing. my big problem is the: Postfix Address Verification like mentioned here: ...
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1answer
367 views

postfix: save all incoming Mails in MySQL DB and have all addresses Verified for big servers

I am new to all that server based stuff. New to Postfix and new to Ubuntu. I have an Ubuntu v-server with Postfix, PHP and MySQL installed. Also I have an own domain. So far, I managed to receive any ...
3
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1answer
74 views

Unknown entries in the default /etc/postfix/aliases file

While setting up a new Postfix installation on a Mageia 3 Linux system, I came upon a few entries in the default /etc/postfix/aliases file that I do not know the background of: # Common aliases for ...
3
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1answer
299 views

How can I configure Postfix to silently drop/discard/reject mails that were sent from specific users to an external address?

How can I configure Postfix to silently drop/discard/reject mails that were sent from specific users to an external address? It should work only for specific users E.g: abc@localdomain can send ...
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2answers
4k views

Postfix, Amavis-new, ClamAV: Permission denied. ERROR

Error lines in /var/log/maillog Sep 22 12:08:20 sun amavis[4493]: (04493-09) (!)run_av (ClamAV-clamd) FAILED - unexpected , output="/var/spool/amavisd/tmp/amavis-20130922T052321-04493-crApLkq5/parts: ...
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3answers
5k views

Helo command rejected: need fully-qualified hostname Error

My mail server is in some blacklist cause of spams. I reconfugured postfix. Aften then My customers get this error they can't send emails. 404 4.5.2 <PLLAMNAZIFE>: Helo command rejected: need ...
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1answer
260 views

Postfix stops working when /var mounted with noexec

I have /var on a separate partition, mounted with noexec,nodev,nosuid. Sending email through postfix does not work, I have following errors in my log: postfix: fatal: unknown service: smtp/tcp ...
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2answers
326 views

Do we need to configure postfix for using Google Apps gmail?

Do we need to configure postfix to use Google Apps gmail account or adding the correct MX records is sufficient. I'm trying to use Google Apps gmail account for my domain. Hosted on CentOS 6 VPS. I ...
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2answers
891 views

Redirect mail adressed to specific address to individual mail servers - postfix

My current set up: mailserver1 mailserver2 (both serving the same domain) and user1 user2 I want do redirect all mails which are addressed to user1 to mailserver1 and the same for user2 to ...