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

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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 ...
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69 views

configure postfix Recipient address rejected, mail and mailing list

I'm struggling with postfix configuration. I was moving my debian server to new host, and since then mail configuration is broken. I have a mail address info@me.com and a mailinglist list@me.com when ...
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18 views

Installing Spamassassin on CentOS - no external emails come in

I've installing Spamassassin on CentOS 7, with postfix and dovecot. Local mails work fine- but no external emails (other than my domain) come in. I disabled Spamassassin; all worked fine again. The ...
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95 views

Postfix relay though another postfix server

I have a postfix server on my LAN running with Virtualmin. I have a total of 4 domains on this server and I need to be able to send and receive email to and from the domains on this server. The issue ...
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54 views

git-send-email Causes “Must issue a STARTTLS command first” Error

I am attempting to send a patch with git-send-email through my Postfix mail server. Unfortunately, whenever I do, I just get this error spat back to me: <recipient@example.com>: host domain....
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21 views

Sync Berkeley MBOX file with Evolution?

I set up a remote email system (so that I can have emails sent to my server). Now I mount the storage location of emails received with sshfs and have the mbox file on my local machine, however the ...
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84 views

How to pass through credentials in SMTP proxy with Postfix

I want Postfix to proxy SMTP connections from MUA on my client to another outer SMTP server. Since the outer SMTP server requires the Postfix proxy to authenticate with SMTP-AUTH, So I set my MUA's ...
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23 views

Postfix change virtual_mailbox_base

Is it possible to change the location of this /var/vmail folder? The situation is that I dont have space on my hdd so I bought an external one which is mounted on /media/mymail. I did copy the /var/...
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74 views

Opendkim Signature Failing

I have followed just about every instruction out there to set up opendkim on Ubuntu 14.04 with Postfix. My opendkim-testkey is successful. However, the DKIM signature keeps failing on Gmail and mail-...
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604 views

How to log postfix messages to a database?

mysql -u root -p postfix < /usr/share/doc/packages/postfix-mysql/postfix-mysql.sql +-----------+--------------+------+-----+---------------------+-------+ | Field | Type | Null | Key |...
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50 views

Dovecot authorization failure

I have set up an mail server on Ubuntu 14.04 basing on Dovecot and Postfix. So far, everything works well with my first user (in my case "webmaster"). Now I have added some more users but I cannot do ...
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95 views

Why is root email coming from a domain name when sending email from Postfix via SMTP to an Exchange server?

I wanted some email relayed out, so’s I ran sudo dpkg-reconfigure postfix and selected Internet with smarthost. I left the system mail name as my box—the server name, SMTP relay host as exchange....
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2answers
463 views

Receiving mails fails (milter service connection refusal)

I'm currently operating a server, on which runs a mailserver. The mailserver was configured by plesk and it worked fine until those messages appeared in my maillog: /var/log/maillog postfix/smtpd[...
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136 views

Can't receive external email in virtualmin

I have installed postfix and dovecot and webmin + virtualmin on my ubuntu server to run a mail server I followed virtualmin tutorial how to set it up. but now I can send outgoing mails but I can't ...
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218 views

postfix: how to apply spam-filter to incoming mail only

I am using spamassassin (or more specifically, spamc) for spam-filtering on my postfix mail server: in master.cf I have smtp inet n - - - - smtpd -o ...
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28 views

mail server with tls behind a cisco router

I have an email server with tls behind a cisco router. Tests for TLS connectins from inside prove that tls is configured just fine. From a host on a local subnet: zzzz@server:~# telnet mail.xxx.co....
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168 views

Delivering emails for one user from two domains into a single mailbox in Postfix+Dovecot

I am setting up a mail server using Postfix+Dovecot on RHEL7. Though it is not required, I would like to set it up such that the mail server is able of hosting multiple domains. The problem that ...
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40 views

Mails to Microsoft's servers rejected

When I send an email to any Microsoft address it's instantly rejected. Searching for a while I find that only MS servers blacklist my IP, and I need to go to JMRP and ask them to remove it: https://...
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18 views

Postfix can not send out email

i just installed Postfix on my Ubuntu but i can not send out any email, here postfix config file #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no # appending ...
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2answers
5k views

Postfix error: Host or domain name not found

I am using Raspbian and the Postfix (version 2.9.6) service seems to be automatically run when I boot, but if I want to send a mail, the email stays in the queue: $ mailq 26CB72201F 443 Sat Sep 19 ...
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70 views

Postfix can send but not receive mails - Recipient address rejected

I have an Ubuntu 14.04 Server with Postfix 2.11.0 and 2.2.9 Since the last weekend my mailserver can only send emails but not receive them. Any help is much appreciated! :-) The Error in mail.log ...
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89 views

I'm Having trouble Receiving Incoming Emails on PostFix

I feel like I get thrown around when I ask questions on these sites (superuser/stackoverflow/serverfault) so please excuse me if my question is in the wrong place and point it out to me and I'll be ...
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87 views

Identify log file for SMTP that would indicate email sending errors

Some of our applications are sending emails via the local SMTP servers. If this local SMTP server was unable to deliver an email, we need to make sure an error is logged. Perform the necessary ...
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38 views

Postfix/Milter: Is it possible to avoid queueing a message but accept?

I am trying to use postfix to capture certain emails, process it out on milter (before queue filter), accept the message. But I don't want it to be queued into the mailbox (no need for the message to ...
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15 views

Postfix + Dovecot prevent vUsers to override previous Replies on the eMails

After I installed the iRedMail (Postfix, Dovecot, ....), the Business Request is to prevent the Users edit the Previous eMails Bodies during their Reply, Reply all, or Forward. I searched for ...
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34 views

I need to block the POP3 DELE Message by IPtables - Linux

I installed the iRedMail (Postfix, Dovecot, ....) and create Mailboxes for Users. But I hanged in the Deletion Request. I want to prevent vUsers (that have MAilboxes) from deleting the eMails (...
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189 views

How to bounce an email

I'm getting spam (thanks to NameCheap not properly cloaking my email address), and I'd like to bounce the emails back to the spammers so they think my account doesn't exist. They're not forged From ...
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2answers
3k views

Make postfix reject incoming email spoofed as from my own domain

I have a postfix server correctly configured to allow incoming mail to my domain, and to require authentication in order to send mail to any other network. A lot of spam that I get has a forged "from"...
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131 views

Mail classified as spam due to incorrect timezone in Date: header

I'm running a mail server using Postfix and Dovecot. My problem is that my emails are getting classified as spam, even though I have PTR, DKIM, DMARC and SPF set up correctly. The test on https://www....
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47 views

Receiving email on linux

I have a CentOS box with a basic postfix instance installed that has a relay configured. The box can send emails to the outside world (ie Gmail, Yahoo). The question is how can I get this box to ...
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305 views

Problems with postfix and sending mails

I have ran into problems while configuring my postfix for my CENTOS machine. Note:The mailserver itself should be localhost only and only be able to send mail internally. the following shows up when ...
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125 views

Why use both Dovecot and Postfix?

Just out of curiosity, there are dozens / hundreds of tutorials helping you setup a dovecot - postfix mail server. On the surface, both of them are email servers, why use both? Mail servers are ...
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23 views

Match .file with POSIX extended regular expression

I am trying to match any file with a dot in the front using POSIX extended regular expression. I know in regex this is ^\..*. This is what I'm using it in: #!/bin/sh MONITORDIR1="/hdd_1/path/to/dir" ...
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42 views

Postfix - How to send local mail with attachment?

I followed a guide on how to set up Postfix for local mail delivery. Guide: http://cafim.sssup.it/~giulio/other/Postfix_Setup_for_Local_Mail_Only.html I would like to send mail containing a single ...
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65 views

Postfix issue on Ubuntu

I have a little issue with my Postfix, I can't receive any email... Every time I try to send an email from an external source, I receive : Jul 28 11:05:38 DESTHOSTNAME postfix/smtpd[24871]: NOQUEUE: ...
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37 views

Postfix virtual map to username at domain

I'm trying to have postfix forward emails sent to a few different emails at a domain to the same Gmail address. I have gotten it to forward 2 of the 3 emails addresses I'm trying to forward but the ...
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30 views

Unable to send email using PHP

I have postfix installed, but can't get it to send any email. I'm not sure what the problem is, it could be postfix it could be something else. I just can't get php to send mail Here is my setting's ...
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146 views

is there easy auto config software for setting up postfix/dovecot/mysql? [closed]

I'm really pulling my hair out on this one. I have installed all of the apps mentioned above, along with webmin and postfixadmin. Webmin gives me settings for dovecot but asks for a sql configuration ...
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252 views

How to add regex aliases in Postfix when using MySQL

I need to create regex based catchall aliases in Postfix setup with MySQL. I have found examples of a mysql_virtual_alias_maps_regexp.cf with this query: query = SELECT goto FROM alias WHERE '%s' ...
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1answer
441 views

Samba4 group email address lookup postfix/dovecot

I have samba4 ad dc setup with my users and groups working fine loginwise. I have installed a postfix/dovecot mailserver on my dc, which is working fine with single user mail addresses, sending and ...
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388 views

Roundcube can send email, but not displaying received messages

I recently installed Roundcube on Debian Linux. I am using Postfix and Courier IMAP as well. Installation was a breeze and I was quickly able to send an email from me@myserver.com to me@gmail.com. ...
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416 views

does postfix 2.11 needs to be patched with VDA patch for per user or domain Quota support, when dovecot 2.2.x is used as imap server?

does postfix 2.11 needs to be patched with VDA patch for per user or domain Quota support, when dovecot 2.2.x is used as imap server ? Im using ubuntu 14.04 LTS with postfixadmin 2.3. i appreciate ...
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1answer
95 views

Cant receive mail from gmail (2)

I've noticed mails being sent from my gmail account to a mailbox on a centos 7 server are not arriving their destination, but no bounce message returned as well. This is what I've found in maillog: ...
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514 views

Postfix with SASL and Dovecot 2 configuration

I'm trying to configure my server to receive and send mails. Sending mails is no problem, but there seems to be an issue receiving mails. I have this configuration working on my old server, but now I'...
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55 views

DoveCot users + multiple domains

Hi I am trying to get dovecot to work with multiple domains My /etc/aliases looks like this # See man 5 aliases for format postmaster: root shop: shop ben: ben When I try changing it to ben@...
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160 views

Prevent Fake E-Mails with Postfix

I have a secure and almost-properly-configured SMTP/Dovecot server running, but I do have a problem. As it's currently set up, anyone (who has valid credentials) can send e-mail from any address in ...
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116 views

make postfix bypass amavis completely for specific domains

I want the postfix agent to bybass the amavis scanner for all mails from and to a specific domain. So, i added the following line to /etc/postfix/main.cf header_checks = pcre:/etc/postfix/whitelist....
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942 views

smtps service not found/“warning: connect to transport private/smtps: No such file or directory”

I'm trying to access an SMTP smarthost example.com using TLS via port 465 by adding smtps inet n - n - - smtpd -o smtpd_tls_wrappermode=yes -o ...
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1answer
3k views

Postfix not delivering messages (554 Client host rejected: Access denied)

Messages from localhost is working normally, but when I try to send mail from i.e. gmail to my domain (as in virtual domain mapping) postfix is denying it with error (554 5.7.1 : Client host rejected: ...
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1k views

How do I block Postfix from sending spam?

My postfix is sending spam from a random-name@mydomain.com address. How is this possible and how do I allow only www-data@localhost to send and postfix to only deliver from myname@mydomain.com to ...