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

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56 views

Saving email from cPanel and integrating it to postfix.

I have a shared hosting environment with cPanel installed managing all email creation, forwarding and all other tasks. But now I have moved to VPS using CentOs and already installed postfix, dovecot, ...
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0answers
29 views

Why are emails sent from postfix getting bounced from gmail as spam? [duplicate]

I am working on a codeigniter project in php that sends emails. In the email config file its setup to use sendmail but in the logs it shows that its going though postfix. I get a bounce back in the ...
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1answer
1k views

postfix[error] :Sender address rejected: User unknown in virtual mailbox table

I install an application, that it needed smtp information for sending mail, I provide smtp user, password and host for that application, but when it tried to send mail this error had occurred in the ...
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0answers
33 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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1answer
66 views

Has my Postfix been compromised? [duplicate]

I'm running a postfix installation on ubuntu 10.04 LTS with multiple domains. The relay access requires authentication with STARTTLS. This morning one of the user accounts logged in and sent hundreds ...
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1answer
63 views

Helo command rejected: Host not found - even though i don't have configured reject_unknown_helo_hostname

My Server is sending Registration-Success-Mails to our users. Most of them arrive, but recently one E-Mail to a specific domain remains in the mailq with the following error (host ...
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5answers
170 views

What domain name should appear in a DKIM signature?

I followed these instructions to setup OpenDKIM with Postfix, and it works as advertised. My outgoing mails have the DKIM-Signature header added, for example: DKIM-Signature: v=1; a=rsa-sha256; ...
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1answer
115 views

Dovecot service doesn't start

I follow these steps to install a postfix/dovecot/mysql mail service: https://www.dropbox.com/s/c2q64gndb9dwpmm/Postfix__Dovecot.pdf When i need to restart a dovecot service and view "mail.log" file. ...
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0answers
84 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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0answers
229 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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1answer
109 views

failing to receive email to subdomain from some host

I recently set up a mail server in digitalocean server with postfix & dovecot. It works nicely for the main domain : example.com I also set up a subdomain : verify.example.com Sending and ...
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1answer
81 views

Postfix alias and “impersonating” issue

I recently started configuring addresses on my postfix server and stumbled into an issue with my colleagues. So assume i have an alias testing@bar.ru which forwards mail to screatch@gmail.com and ...
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1answer
190 views

Postfix limit number of emails send in a month/Day

Is it possible to limit the users to send total email in a month/day. I am trying to enforced marketing users to send newsletter according to their assigned quota. Example 1. user1@example.com: can ...
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1answer
37 views

Postfix record recipient if unable to deliver or bounced

Help would be greatly appreciated. I am not a server admin but I have been tasked with making a means of auto-removing a email recipient from the database containing a table with a list of emails, ...
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1answer
32 views

How is postfix relay configured by default on OSX?

On OSX, I don't need to configure postfix at all, I just sudo postfix start and it all works. In the log files, I see Apr 23 14:04:46 orcrist.local postfix/smtp[19506]: 9211B2E4B96C: ...
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4answers
142 views

How can I secure postfix so my ISP won't block it?

Our dev server is a CentOS LAMP system for developing web sites. We want PHP to send email. The server doesn't need to receive email or anything else, literally just send email to our developers. I ...
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1answer
32 views

postfix master.cf configuration from database

I am wondering if it is possible to configure postfix master.cf file from database. Same as, for example, in main.cf one can set alias_maps = pgsql:/etc/postfix/pgsql-aliases.cf What I'm ...
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1answer
57 views

Leaving postfix 'mydomain' & 'hostname' empty in this scenario [closed]

I have a VPS server that only deals with email hosting. This server does not have any designated domain name pointing to it. Its only one VPS with one IP address. I am running CentOS 6.5 Minimal, ...
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1answer
71 views

Fail to relay email with Postfix

I want to relay mail to local SMTP to mandrillapp, with the /etc/postfix/main.cf smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no smtp_sasl_auth_enable = yes ...
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0answers
126 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 ...
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0answers
25 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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3answers
112 views

How can I set Postfix outgoing port to 465, but keep incoming port to default?

My ISP blocks port 25. So, I cannot connect to my server and send emails. I've tried changing it to 465. And it works! However, after this change, I cannot receive emails anymore. # # Postfix master ...
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0answers
78 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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1answer
190 views

Setting myhostname and Mydomain in postfix for mutiple domains

I have 5 domain names currently pointing to my email server, which is running CentOS 6.5 with Postfix, Dovecot installed. Although I am now only able to receive emails but not send (for reasons I ...
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2answers
60 views

Do I need SMTP when using Postfix/Dovecot? [closed]

I have setup Postfix and Dovecot. Microsoft outlook tells me it cannot find the SMTP server. I thought dovecot would handle all the deliveries? Do I need to allow postfix to listen to external ...
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2answers
39 views

Postfix sending and receiving in strange way.

I have an email server, running on CentOS 6.5, 32bit system, with Postfix and Dovecot running along all their dependencies. Let's assume my domain is www.anw.com I have created A record in this ...
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0answers
151 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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1answer
37 views

Postfix - E-mails missing, no message in the log

I'm setting up a postfix + dovecot mail server for myself on a VPS. I plan to host a couple of domains with it and be able to manage the users via MySQL. It currently works as I would like to but it ...
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0answers
60 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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1answer
77 views

How do I get postfix to send and receive emails after server OS update?

I apologize in advance if this is a duplicate. As I've mentioned in other questions, I'm not a server guy by any means. Background information: I'm currently using an Ubuntu server which was updated ...
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1answer
92 views

mail issues. cent os6, postfix and php mail. many domains, one with google apps

I am running a private server with centos6. I am using postfix. My "main" domain is using google apps to deliver its messages. I have several other websites hosted on this server too. The problem is ...
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0answers
67 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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1answer
32 views

How I can set the errors in spanish language on postfix server email?

I have a postfix servers in my network and very much users not read the english lenguage, and I want set the errors in spanish language. My version of postfix email servers is: mail_version = 2.9.6 ...
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1answer
63 views

Create IMAP mailbox in linux server

I am using Postfix 2.10.2/Dovecot 2.2.5 on RHEL 5.9. I used to create normal virtual mailboxes. How can i create IMAP mailbox and use it and how to differentiate it from POP3 mailboxes ? I hope i am ...
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1answer
25 views

How do I simply forward email to an external address using Postfix aliases?

I don't want to deal with postfix virtual. I want to use aliases (/etc/aliases) Is there a way to do this?
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45 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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0answers
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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0answers
62 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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1answer
91 views

Multiple mail servers for a single domain [closed]

Running a "DNS scan" to make sure my DNS zones are setup "correctly" led to the suggestion by the tool to run more than one mail server for redundancy. It got me thinking about how one would implement ...
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1answer
23 views

postfix multiple recipients for the one address

I'm running postfix on centos and in my /etc/postfix/address I have email@domain.com username which works and now I want two people to be on that list now. I've tried email@domain.com username, ...
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2answers
293 views

postfix permit_sasl_authenticated in smtpd_client_restrictions for submission on 587

First let me explain my setup. I'm using postfix 2.9.6 on Debian Wheezy. I do not allow AUTH on port 25, and force MUAs to use a submission service on port 587 instead. Debian comes with the following ...
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3answers
107 views

Maintain email timestamp when transferring between email servers using an email client

I am running two different email servers using Postfix and Dovecot. Some of my users have accounts on both servers and sometimes transfer emails from one to the other through their email client. When ...
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2answers
42 views

Efficient way to get Postfix talk to SpamAssassin

Traditional methods of doing this on SA wiki talk about shell scripts as content filters. Well that's an additional fork syscall on every email and the volume that will flow through the machine is ...
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1answer
61 views

Adding Reply-To header using Postfix if it does not exist in the mail headers

I would like to add a Postfix re-write rule to insert a Reply-To: header if there is not one already defined. This server is a web server with PHP and Perl scripts, we do not want the mail sent from ...
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1answer
133 views

550-Verification failed when forwarding email to some servers

I have a Postfix installed and working with SPF check and SRS-rewriting. When it forwards email for an external address, sometimes its smtp denies relaying the mail with the message: Relay access ...
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1answer
27 views

Using DKIM in my server for multiple domains (websites)

As I couldn't find this exact tutorial in Stack, I share my findings with al of you. I always get things solved thanks to this comunity. Thanks! Original question: I've read the tutorial posted by ...
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0answers
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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1answer
54 views

Does postfix try all MX records by default?

One technique for preventing spammers hosing your SMTP server is to set your lowest MX record to something fake. I'm having an issue with Postfix not being able to connect to the Meaningful Use ...
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1answer
114 views

How can I disable sending mail through postfix smtp with out auth

I just setup a mail server with postfix 2.6.6 and dovecot. I have the auth related config in main.cf like below: smtpd_tls_cert_file=/etc/httpd/ssl/mail.crt ...
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1answer
131 views

I can´t send emails server with Postfix in Debian [closed]

im trying to sent mail through php, in a Debian server with postfix, when i run the following script in the server, the code tells me that the email was sent successfully, This is my code: <?php ...