Free and open source mail transfer agent (MTA) that routes and delivers email

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Postfix Policyd both for SASL and non-SASL mail

I have configured Policyd v2 (cluebringer) to apply quota on msg count for SASL and non-SASL users. It is easy in policyd [1]. However I don't know how to configure postfix (2.7.1). Right now I have ...
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21 views

How to force postfix follow (dns) mx priority even for local domains on Linux Ubuntu Server with Plesk

Use Case Scenario I have a Linux (Ubuntu 12.04) with Plesk (11.5) hosting server where some clients use the server's mail service only as a failover. They set up an external mail server with higher ...
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27 views

drop smtp live connection

So the problem is that I think my server got DDoS attack with SMTP packet (my mail server). What I can see is that the attacker abuse the smtp_connection_cache. The attacker keep connections (smtp) ...
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28 views

postfix nested MAIL command

I'm trying send emails using postfix. I can send emails to other users (just now only in a local enviroment), but for some reason, when I execute the command: mail -s "subject" use@domain ...
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23 views

Postfix+DKIM using Amazon's second private IP address

I use Amazon EC2 with 2 private IPs. I have 2 postfix instances (using multi-instance builtin support) with opendkim. Each instance works when I send email (over telnet) using the primary private IP ...
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33 views

Duplicate emails being sent

I'm on a Mediatemple server with Plesk 11.0.9, CentOS 6.4. The same email was sent to user@wesleyan.edu 31 times and I'm trying to determine why. This has been a reoccurring problem with various ...
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33 views

What causes java ssl handshake to fail

I am having a problem with just setting up a null mail server (just tp send out notification mails)I have the following error : javax.net.ssl.SSLHandshakeException: ...
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48 views

Postfix configuration for mails with multiple recipients

Because of some requirements, I configured Postfix to redirect any incoming mail to my python script. My script reads the mail from stdin and saves stream to file. If it receives mail with only one ...
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42 views

Postfix, schedule batches of email to be sent

Is it possible to have postfix limit the amount of emails it sends at once and when there is larger than x email, send them out in timed batches (wait 5 minutes, send another 50, something like that)? ...
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20 views

Add a per-domain filter in sieve

How can I set up a per-domain filter in sieve/dovecot? In documentation I can see per-user setting: sieve = ~/.dovecot.sieve, and right now I'm using global filter: sieve_before = ...
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20 views

Configuring SMTPS in Virtualmin

I'm attempting to configure SMTPS in Virtualmin and am running into a roadblock. I followed the instructions here without a problem but when I do the autoconfigure in Thunderbird it still says that ...
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49 views

Zimbra SMTP Reverse DNS Mismatch

I have a Zimbra email server. sending and receiving is fine, however When I use online tools to check that things are configured properly, I'm being told my reverse DNS SMTP Banner is wrong. ---- ...
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28 views

Sending e-mails from Postfix to Exchange 2007 locally

I have postfix setup on Redhat server and Exchange 2007 setup as well. both mail servers share the same address space "Labp.com". I setup Exchange to send e-mails to postfix server by configuring a ...
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27 views

Collectd / Tail Plugin for Postfix shows Incorrect Numbers

I am using collectd 5.4.0 with CGP 0.4.1 on a freshly installed Ubuntu 14.04 LTS. All default settings work as expected and charts are being generated. To track Mails being sent from the Server, in ...
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49 views

Newly installed iRedmail box can receive, but not send mail

I'm fairly new to personal mail servers and postfix, so after bashing my head against the server for a few days I figured I'd ask the experts. As the title suggests, I have some sort of a ...
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55 views

Postfix: Offer SASL authentication based on RBL

Given the current spam waves, I'm thinking about offering SASL authentication only to clients not listed in specific DNS-BLs. The effect should be: SASL auth is not offered -> no way to relay mail ...
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40 views

Tell postfix to merge three Authentication-Results:-Lines into one?

I am running a postfix mta with debian wheezy. I am using postfix-policyd-spf-python, openkdim and opendmarc. When receiving e-mails from google (google apps with own domain) for example, the header ...
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95 views

Postfix - suspend domain from which deferred status was received?

Is there a possibility to make Postfix stop trying (for a period of time) to send emails to a domain from which it received a deferred response? Currently my Postfix goes through each address in the ...
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23 views

Use greylisting only if SPF fails

I have noticed that more and more people using the DNS based SPF records and I want to enhance my spam filter. I am using SPF and greylisting after each other and my idea would be to use only ...
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19 views

Postfix does not offer authentication on submission port when it is enabled

I'm having an odd (to me at least) problem with a new Postfix install. I'm using Postfix with Dovecot, and the IMAP from Dovecot is working just great, but when clients try to send mail to the ...
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23 views

Postfix : relay based on sender address AND recipient address

I have configured postfix to relay mails based on the recipient address. In transport I put something like this: recipientdomain.com relay:[my.relay.com] This works fine, when I send an ...
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40 views

Centos/Postfix able to send mail but not receive it

I have set up postfix and used the mail command to test and an email was successfully sent and delivered. The email arrived in my yahoo inbox BUT the sender also recieved an email in the Maildir ...
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19 views

Mail not piping in postfix

I have setup a postfix server and wanted to test the piping of mail to my perl script where i can make use of it and filter the mails.I wrote a test script for that which just logs the information in ...
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45 views

send outbound postfix email to other server

I have more than 18 mail servers, running postfix. All of them have around 10,000 customers with more than 25,000 email addresses. as we didnt applied password policy before (and cannot apply it now ...
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99 views

Email client wont connect to SMTP Authentication server

Im having trouble installing SMTH Auth for my ubuntu email server. I have followed ubuntu own guide for SMTH AUT (https://help.ubuntu.com/14.04/serverguide/postfix.html). But my email client ...
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68 views

Does postfix create maildir folder?

How do you make postfix create Maildir/ folders automatically for all users ? I have these two lines in postfix main.cf, which supposed do create maildir folder after the first mail but it is not ...
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177 views

Postfix can't connect to certain smtp servers port 25 Connection timed out

Firstly, this should be an outbound-only server. MX records for the domain point to google's mail servers (and that's working fine). The server will successfully deliver mail to gmail, and domains ...
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35 views

maildrop and quota exceeded

I implemented warning maildrop when quota exceeded. This worked correctly except for one detail. The drawback is that sending mail notice is sent only time... I mean for example if the mailbox has ...
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32 views

Mailx not reporting the IP the mail was sent from in header?

In the Header file of the final mail on y local server using postfix i am not able to see the Sender's ip which is usually under received from. From root@testmailer.com Wed May 28 12:26:54 2014 ...
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50 views

How to change IP address according to sender in Postfix?

I need help.I am stuck for too long now.I have setup a postfix server on my system.Now i want to change the IP corresponding to the sender.For that i used sender_dependent_transports and configured ...
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76 views

Postfix + Dovecot + MySQL : (user unknown) on virtual users

I've set up a mail server using Postfix + Dovecot (dovecot auth) + Postfixadmin The server is working great, be it for SMTP or IMAP, except that messages to virtual users get bump with the following ...
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39 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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42 views

Spam mails from vulnerable wordpress contact form

Recently I receive an e-mail from my server's host about spam mail coming out from my server's ip. I tracked down the problem to a specific site that is hosted on my server, it is a wordpress site and ...
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458 views

Postfix and OpenSSL: “Unable to get local issuer certificate”

I bought a certicifate for my mail server and configured it in Postfix like so: smtpd_tls_security_level=may smtpd_tls_CAfile = /etc/ssl/certs/ca-certificates.crt smtpd_tls_cert_file = ...
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182 views

Dovecot Postfix SMTP-AUTH dovecot: imap-login: Disconnected (auth failed

I am installing a new mail server using postfix dovecot , mysql and roundcube 0.9.5 as mail client with the smtp-auth functionality and below are my configurations.I am failing to authenticate and ...
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32 views

How to setup Postfix with MySQL while each user has its own maildir path?

I'm trying to make Postfix use MySQL as its virtual configuration storage. I've been reading this article. In there user table comes without a maildir path field. But I need Postfix to store incoming ...
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80 views

postfix: connection refused on relay, but telnet works

I'm trying to build a postfix relay for two domains, running in a docker container, and should not deliver any mail locally. One of the backend postfix servers is mail.example.net. I can connect to ...
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79 views

Virtual SMTP to send email through Exchange Server (via EWS)

We have a web application hosted by a third party that must send e-mail using an existing MS Exchange Server 2007 account in our premises. This application only connects to SMTP Servers. Our ...
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29 views

postfix: postfix-policyd and postgrey

I have postgrey working very good, but I also want the bean-counting features of postfix-policyd to see what's going on the smtp. is it possible to work with postfix-policyd and postgrey the same ...
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78 views

Cannot verify DKIM signature: pubkey_unavailable

Ok this one is new for me. I get an error looking like this. Apr 27 17:00:46 powerplant postfix/smtp[2695]: E614FC0867: to=<****@***>, orig_to=<wood@*****>, ...
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177 views

Postfix STARTTLS certificate not working in Thunderbird

I just replaced my expired cerificates for SMTP communication on Postfix server but I am no more able to send emails through Thunderbird. I created a new key and the signing request: openssl req ...
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72 views

Postfix Backscatter Issue

Good day, We have Postfix on Ubuntu 12.04 LTS. When we had 3 clients phished, it appears that when we cleaning up we may have messed up our main.cf and master.cf We used backups to bring us back. But ...
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104 views

Postfix relay_domains configuration for outgoing mail

im pretty new to Postfix and email administration in general. I have installed postfix on my debian 7 server following this tutorial Now, I can receive emails and if I try to send them using ...
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50 views

force upstream smtp outbound through proxy

Upon inspection of emails sent outbound to external domains, the backend is revealed as being the true sender, rather than the proxy itself. When sending within the domain, from local user to another, ...
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58 views

postfix: Creates bounce mails on mails which have auto-submitted set

Our Postfix creates "Undelivered Mail Returned to Sender", although the original has these headers set: Auto-Submitted: auto-replied Precedence: bulk Why does postfix create a non delivery report ...
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15 views

Is there finer rate control for Postfix, e.g. 2/second?

I have managed to tune down postfix sending to one every second or one every five seconds. There's also an option to send only two or three concurrently. Is there any way to send two every second or ...
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57 views

Postfix/Amavis email vanish without a trace after cleanup/scan

Have this weird problem after amavis was triggered, mail vanished after cleanup. Apr 11 15:45:28 smtp postfix/smtpd[19861]: DD66613C04A: client=SENDER.com[66.66.66.666] Apr 11 15:45:28 smtp ...
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10 views

How to add identity in dkimproxy?

DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=simpel-mailclient.com; h= from:to:subject:message-id:date; s=k1; bh=5eALQvUpOrW373J9iUFeZW p3Nag=; ...
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36 views

how to change postfix mail recipient(To:) when sending to multiple external accounts

I have configured postfix mail server for outgoing mails. This server is used to multiply emails via virtual_alias_maps. x@domain is email account which multiplys emails for aliases, y1@domain2.com, ...
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49 views

Postfix trigger script breaking messages

I am trying to intercept messages coming in, run a script on them, and pass them on to MailScanner. For now the script simply reads the message into a file, but when I place that file into ...