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

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3
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648 views

Postfix sasl relay host - weird behaviour

Previously I had a relayhost set in postfix to mailhost.zen.co.uk - I don't think it accepts SASL - only TLS. So I though I would try changing to a different relay host. However, the following log ...
2
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0answers
84 views

How to route some email accounts of a domain with transport_maps to another MX if user doesn't exist locally?

The MX server in my domain example.com point to my Postfix server. However, I have also configured a Google Apps account responsible for emails of example.com. I want all emails to go to my Postfix ...
2
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0answers
169 views

Diagnose SASL LOGIN authentication failure with postfix and sasldb

I am trying to configure a Postfix SMTP server on my personal machine (ubuntu server) using sasldb2. So far what I have set up works well with the test command: testsaslauthd (however it may be ...
2
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0answers
62 views

Is it possible to hold rejected messages in a queue?

I have a custom Postgresql backend for my virtual tables in Postfix, but there are times when a user's email isn't correctly configured and is responded to with a User unknown in virtual alias table ...
2
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0answers
95 views

Mail Service requires reboot every few days

I'm kind of new to postfix so am hoping someone can point me up the obvious here I have a Postfix working as SMTP server and everything is fine for a few days. Then without warning or apparent reason ...
2
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0answers
434 views

Postfix server begins send spam immediately after starting

I've installed a postfix server on a debian os & also I've installed apache 2.0 with php on same machine Several days ago my server begun to send a lot of spam messages via postfix. I understood ...
2
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0answers
915 views

Randomly getting Postfix SSL_accept error / Dovecot TLS handshaking Disconnected

I have this really weird problem since a couple of days/weeks: more and more people are reporting problems connecting to the mail servers (Dovecot IMAP and POP3 as well as Postfix SMTP) in SSL mode. ...
2
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0answers
983 views

MailScanner stuck in endless loop

I'm trying to install MailScanner and it seems to be stuck in a infinite loop. It scans the same messages and when it's done, it doesn't requeue them into postfix: May 3 14:58:13 marine ...
2
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293 views

Postfix removing domain from user names before passing to Dovecot for IMAP authentication

In IMAP authentication with Dovecot, Postfix is stripping the domain name from virtual users who share a name with a local user, causing them to fail authentication. Virtual users without local ...
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41 views

Postfix: How to use a simple script to map recipient addresses 'virtual_alias_maps'-style?

I would like postfix to consult a simple (bash/python) script in order to find out (virtual_alias_maps - style) before-queue whether or not a recipient address it legitimate. E.g. i'd like to use mail ...
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35 views

How to make Postfix to POST incoming mail to an external server?

I have a web app on Server A and a Postfix mail server on Server B. I want all incoming emails be forwarded to the web app via a POST request. I also need to capture attachments. I was able to ...
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35 views

Postfix header rewriting

I'm currently trying to install a Postfix server (trying to start an SMTP service for people) and was going through some newsletter senders I was receiving emails from lately, and saw something ...
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53 views

postfixadmin Could not log into IMAP/POP server

I had installed and configured dovecot, postfix, and postfixadmin step by step from this tutorial on my server (CentOS6). But I don't know why, when I want to create Mailbox from postfixadmin then I ...
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0answers
87 views

When does Postfix not perform lookups in virtual_alias_maps?

I'm having a real pickle of a problem: I have a Postfix 2.6.6 / CentOS 6 server that's set up to forward mail from specific aliases to specific destinations. This is done through a mysql ...
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0answers
108 views

Postfix selective header_checks: smtpd_relay_restrictions vs. smtpd_recipient_restrictions

Some of my customers implemented commercial software that violate email-RFCs such that we have had to relax our header checks. In consequence, we receive more spam. Prolog: I know the domains ...
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0answers
103 views

Posftfix - MTA during fwd-connect Negative greeting

I have problem with postfix on Debian Squeezy (Yes. Squeezy). I can't send email, idk why. My postqueue: root@mx-2:~# postqueue -p -Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient------- ...
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0answers
41 views

Postfix on Linux: easy way of masquerade_exceptions=<all system users>?

... well, the subject says it: in a NULLCLIENT configuration, we want to have all normal users to be masqueraded, but all system users should be exposed. The sysadmins get system user's mails from a ...
1
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0answers
18 views

Make Postfix add ReplyTo based on the receiver

I need Postfix to add a ReplyTo header to certain e-mailadresses to somewhat emulate a mailinglist. Example: user@domain1 sends message to user2@domain2. The shared@domain2 get the message with both ...
1
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0answers
43 views

postfix smarthost mixed with usage of external mailserver

In a SOHO setup I've got a mailserver with fetchmail, dovecot, roundcube and postfix running. Fetchmail fetches the mails from the isp, postfix and dovecot handle the rest. Postifx sends emails in a ...
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0answers
30 views

Postfix tries to deliver forever

I have a postfix mailserver on LAN which is only used to send email alerts to internal domain names. It does not have any route to the internet, nor does it have a DNS setup. Now after couple of ...
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0answers
52 views

POSTFIX: how to determine how many connections are currently active

I'm running postfix on a mail server which is used by a couple hundered users. One user is getting "Connection Interrupted" errors in Outlook when attempting to send. I have not had reports of this ...
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101 views

Login to SquirrelMail as a virtual user

I am on CentOS 6 with Postfix, Dovecot, and PostfixAdmin. I have configured an external domain with the user me@domain.com as a virtual user. It's receiving mail without a problem at ...
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531 views

Postfix: Reject forged sender/from address

currently, i find myself in the situation where once Postfix 2.11 has been configured to properly reject outbound forged emails addresses when sender login mismatches and also when sender address does ...
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75 views

Postfix configuration with DKIM to send mail from multiple domains

My current setup is a Postfix installation configured with DKIM on a server with hostname prod01.example.com The server is used to send out mail on the form webshop@example.com, ...
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53 views

Where do I add DKIM details to amavisd.conf on Ubuntu?

I'm trying to add a DKIM key to an additional domain on my Ubuntu mail server, I am trying to add the following block of code to the amavisd.conf file $enable_dkim_verification = 1; ...
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126 views

Postfix transport relay based on result of MX lookup

You can tell postfix to relay all mails for *@gmail.com via your account on smtp.google.com using transport maps: # /etc/postfix/transport gmail.com smtp:[smtp.gmail.com]:587 . # ...
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20 views

Postfix master issue

Today i noticed the following in my postfix logs: I got this in logs: Mar 6 13:36:16 my_server_name postfix/smtpd[23482]: connect from <other_server_IP> Mar 6 13:36:16 my_server_name ...
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77 views

How to avoid 554 error duplicate header

I set up IRedMail on an AWS server, so the mail stack looks something like this: Postfix Dovecot Roundcube Mail sent through Amazon SES I'm trying to forward emails to Gmail using the Managesieve ...
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101 views

Postfix performance and how to increase my throughput?

What I've read so far: Postfix Tunning Postfix Bottle Neck Analisys The Book of Postfix (chapter 22) I have similar specs to this guy but I'm only able to send about ~1300 emails/hour What I've ...
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0answers
1k views

postfix queue active and mail transport unavailable

I am not very familiar with postfix, but I am pretty sure that what I am seeing in my logs is not a good thing, and I was hoping someone here might be able to shed some light on what is going on and ...
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0answers
34 views

How to configure Postfix to only send out emails with a certain header?

I'm setting up a local development VM and I was able to redirect all sent out emails to a local mailbox using virtual_alias_maps with the entry /.*/ username. What I'd like to add is an option to not ...
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0answers
122 views

Missing Client IP in postfix Received header

I just noticed my postfix setup has been having a problem for some time now. When receiving (some) mail from German freemail provider web.de, the following headers are found inside the mail postfix ...
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22 views

Mail server can't connect to database

While trying to set up a new Mail server, I installed and configured dovecot, postfix, postfixadmin, squirrelmail, clamav. I imported a database from another (old) mail server to the new one. Postfix ...
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0answers
129 views

How to use ViMBAdmin with Courier (Mail Server) Postfix / MySQL

i've setup and got courier and Postfix working but ran into a issue when setting up ViMBAdmin. Courier cannot read the passwords from the database i believe, anyone know how to audit the daemon to ...
1
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0answers
114 views

Postfix: Resend 'hard' bounces

I had a number of messages get rejected by the recipient's mail server with a status 550 code due to an IP address blacklist. I've sorted the problem that caused the host to become blacklisted, and ...
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0answers
81 views

Prevent spam being forwarded by Postfix (while locally delivered to a Junk folder)

We have a pretty standard Postfix/Amavis setup where we use the Dovecot LDA to deliver mail locally. Amavis passed spam mail and we use Sieve to drop it in the Junk folder of the user. The problem is ...
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0answers
30 views

“Masquerade” mail sender on a multi-domain shared hosting

I've a single host with CentOS 6.3. I manage that host via SSH. The server itself is uname -n: servername.foo.com. On this host I've multiple, unrelated httpd vhosts. The problm is: when one vhost ...
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0answers
160 views

Postfix mail stuck in queue indefinitly

I've been trying to set up a simple mailserver for myself using the following guide : Guide. I've added my domain via Postfixadmin and setup a info@mydomain.org mailbox. But when I try to send to mail ...
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0answers
58 views

Postfix - mixing virtual_aliases and virtual_mailboxes (catchall)

I'm running postfix (2.9.6) with dovecot (2.2.5) and I two domains: example.com as a virutal_mailbox_domain example.org as a virtual_alias_domain I'd like to set up two different catch-all rules ...
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0answers
509 views

Cant get IMAP to work on debian & postfix

I'm trying to setup a simple mail server on a debian vps with postfix and dovecot. I can send and receive email from the server via mutt but when i try to connect to IMAP via Thunderbird for example, ...
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0answers
282 views

postfix opendkim DKIM-Signature and Domainkey-Signature

Running postfix on CentOS 6 as an edge relay for a while now, so all our outgoing mail is routed through one point with opendkim signing the mail. This works great. I was originally using ...
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0answers
124 views

Virtualmin configuration disable all email send and receive

We have a server (Ubuntu 12.04) that we use mostly for development purposes. There are about 50 vHosts created in Virtualmin that I would like to completely disable the ability to send email. Under ...
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0answers
91 views

Configure postfix to limit total number of connections from any and all SMTP clients in a given time period?

I am trying to figure how to configure Postfix to operate within the requirements given by Spamhaus for free usage of their DNSBLs (http://www.spamhaus.org/organization/dnsblusage/). They specify that ...
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0answers
152 views

Postfix + Amavisd-new as smtp-proxy (pre-queue) for inbound only, postqueue for outbound?

I am in the planning phase of building a mailserver with the following requirements relevant to my question: Use postfix, virtual users (two virtual domains) Must filter pre-queue to reject ...
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0answers
62 views

Google Apps MX for User Accounts, Custom Postfix for Sending only, same domain

I have a google apps business account which provides the use of gmail's mx servers. I would like to use this for users to send/receive email. However, I have a specific need to send bulk emails on a ...
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0answers
201 views

Postfix: e-mail is not received on server mailbox. Forward does work

For this server I'm running virtualmin. It comes with postfix. One of my users is complaining he's not receiving all the e-mails. To check this I let postfix forward his e-mails to another e-mail ...
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0answers
259 views

How to configure Postfix to use multiple IP aliases for sending out email?

Running Postfix on Linux. I know how to create IP aliases. I know how to create multiple smtp transports and bind them to various IPs: smtp_bind_address=X.Y.Z.Q I know how to assign a transport ...
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0answers
312 views

postfix: relay all mail to office365 server

I'm decommissioning an Exchange server and moving the mail accounts to Office365. However, some of the computers on my LAN generate email status messages. Previously those were delivered to my ...
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0answers
143 views

Postfix sending corrupt pdf attachments to exchange

We have a php web application that creates pdfs and send them to users , everything worked fine on a centos 5 with postfix 2.3 , we want to upgrade to centos 6 with postfix 2.6 . sending to gmail or ...
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0answers
154 views

Postfix - SASLAuthentication Problems Cram-MD5 with StartTLS

Recently I configured my mail server which uses Postfix and Courier. Everything works except for the authentication when sending mail via my Postfix server(running on port 587) which has StartTLS ...