Free and open source mail transfer agent (MTA) that routes and delivers email. When asking about postfix problem, please include the relevant maillog lines and output of the following command: "postconf -n" (content of main.cf) and/or "postconf -M" (content of master.cf)

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1
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1answer
45 views

Enabling STARTTLS for all on Postfix with Zarafa

I ran into a problem which I just cannot solve with just googling it - I need some expert help. My company runs it's own mailserver (postfix with zarafa groupware). We're an insurance company so we ...
0
votes
2answers
30 views

Create and save mail to inbox locally with Postfix

Apparently it's as simple as just sending an e-mail to a local account, and configuring Postfix to receive mail for the local account. Not too shabby! Original Question This hypothetic server would ...
0
votes
0answers
54 views

Configure Postfix to send emails from my domain name

All my clients use gmail, but would like to use the domain name that I own, say domain.com to send from. I've already figured out how to forward emails that go to domain.com to its respective gmail ...
0
votes
0answers
89 views

Zimbra Admin Page White Screen

I'm having an issue where my zimbra admin page (https://zimbraurl:7071/zimbraAdmin) is only showing a white page, F12 is giving me this error. I'm running version 8.6.0_GA_1191, I've gone though ...
0
votes
0answers
174 views

Postfix error: no SASL authentication mechanisms

I have searched many hours but can not fix the problem. Does anyone can show me the way to fix it? This is my postconf -n postconf: warning: /etc/postfix/master.cf: undefined parameter: ...
0
votes
0answers
34 views

Postfix: I've misconfigured my virtual forwarding, VIRTUAL@com.com is getting my email

So I've setup postfix for say me@example.com, I then forward emails to that address to my gmail as I don't want to store them on the vps. My /etc/postfix/virtual has equivalent; me@example.com ...
0
votes
0answers
57 views

Bypass client and recipient restrictions by domain name

I'm wondering if there is a way I can bypass the restrictions by domain name. For example; mydomain.com will follow the client restrictions listed below normally. mydomain2.com will skip client and ...
0
votes
0answers
36 views

PostFix Issue When Sending Emails through Outlook

I also have the Relay access denied issue and it's really disturbing me. Your help is much appreciated. I can send and receive normally from the web mail. However, when I configure the email on ...
0
votes
2answers
88 views

Catch all forwarders for multiple domains on Postfix (Ubuntu)

I'm trying to figure out catchall forwarding for multiple domains on my Ubuntu server. I have it working for a single domain (maindomain) but cannot get the addons 1 and 2 to work. My /etc/postfix/...
0
votes
1answer
53 views

Postfix mail server failed email sending(First setup)

I've went through the article below step by step in order to make Postfix up and running on Ubuntu 14.04: PostfixVirtualMailBoxClamSmtpHowto Now in the step where it says to use mail command to ...
2
votes
2answers
413 views

Mail with DKIM Signature gets T_DKIM_INVALID flag by SpamAssassin

I've installed a Debian (jessie) box with postfix and spamassassin. Configured and everything works fine. Except receiving mails with DKIM signatur will produce a flag T_DKIM_INVALID even if the ...
0
votes
1answer
40 views

Scan outgoing Postfix email for spam with Spamassassin

Is there a way to filter outgoing Postfix email for spam possibly with Spamassassin? I found this answer about how to do it with Amavis but it's terribly outdated.
1
vote
0answers
31 views

Postfix STARTTSL works in LAN but not from external (centos 7)

if I connect in LAN on port 25 to my mailserver it offers STARTTLS telnet mailserver.com 25 Trying 192.168.0.x... Connected to mailserver.com Escape character is '^]'. 220 mailserver.com ESMTP ...
1
vote
1answer
54 views

remove postfix without removing tripwire (Ubuntu 15.10)

I installed tripwire and by mistake asked it to install postfix. How can I remove postfix and not lose tripwire? root@blah:~# apt-get remove postfix Reading package lists... Done Building ...
0
votes
2answers
161 views

Relay local mail with Postfix

The Situation I'm using SpamExperts for email archiving. In order to get a message archived, the message must go trough an SpamExpert's Smarthost before reaching its final destination. If I want to ...
0
votes
1answer
17 views

How to show/include originating domain/application in Postfix logs

I have a server which hosts a number of applications mostly built with Drupal. These applications are configured to send mails and Postfix is my MTA. Is it possible to have the applications and/or ...
2
votes
1answer
29 views

Mailman: How to split up mails into batches

Having huge mailinglists with maybe 10k subscribers, is there a way to split list forwarded by mailman into batches maybe a 1000 mails sending out each batch maybe with an offset? Or would it make ...
0
votes
0answers
43 views

Roundcube Not Fetching E-Mails from /var/mail directory

I recently set Roundcube up along with Postfix and Dovecot. It's all configured correctly as far as I can see. Roundcube sends emails fine but doesn't fetch any, what's strange is I can see the E-...
1
vote
0answers
23 views

Redundant procedure when using Postfix relay

I have a Postfix server with the following main.cf file (I'll show just the relevant info): smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd ...
0
votes
0answers
333 views

Postfix: error: open database /etc/postfix/generic.db: No such file or directory

I am seeing such an error when starting the postfix server, and also lots fo failures when watching the maillog. How can I solve this issue? Jan 13 22:43:46 CentOS-72-64-minimal postfix/master[1651]: ...
1
vote
0answers
60 views

Webserver to send emails from Postfix

I have a problem with my web server sending out email from websites through postfix. I have server that is running Ubuntu 12.04.5 and using Apache webserver. I have installed virtualmin on the server ...
1
vote
1answer
22 views

how do I filter and reject mails in postfix based on the 'to' address

My CentOS server is configured for outgoing mail only. I need a filter to reject mails targeted at selected destinations. For example, if I test with > mail -s "test" spam@trash.com I want this ...
-1
votes
2answers
242 views

How can I reject spam before reaching SMTP on Postfix

My server has started receiving thousands of attempts to use my mail server to send spam from dynamic.hinet.net. The attempts are always rejected, but it's non-stop. I'd like to block these attempts ...
1
vote
0answers
29 views

How do I use SRS rewrite the From header on a forwarded email message

I have a serious problem here. I run a labor dispatch website, where users can register their cell phones (I send them an auth code via text, they enter it at the website, it's entirely opt-in). A job ...
0
votes
1answer
142 views

Postfix Localhost Server Sending Spam to Itself

I have an iRedMail server that runs Postfix and am trying to determine the source of its spam problem. I have since changed the MX records on the domain for the address receiving spam and the good ...
1
vote
0answers
17 views

PostFix/Dovecot new installation on Centos6

I have installed Postfix and Dovecot on my server. It seems to be mostly working - I can send mail from my account to a remote account no problem. My problem is receiving it. When I send an email ...
0
votes
2answers
74 views

Can Mandrill route inbound email to webmail (like roundcube)

My main issue is I setup a small server, and my ISP blocks port 25. I've setup Mandrill as a relayhost on port 587 in postfix, so that solves my sending issue. I know Mandrill can be used to route ...
2
votes
0answers
26 views

Postfix: deleting emails with recipient not in virtual_alias_maps

I'm getting a lot of spam for recipients that don't exist on my domain. I'm forwarding email on this domain to various external addresses for my family by using virtual_alias_maps. To prevent these ...
3
votes
1answer
136 views

Postfix reject_rbl_client Blacklists Not Working

I have a mail server (iRedMail) that uses Postfix. I've been getting a lot of spam, so I modified the /etc/postfix/main.cf file and have the smtpd_recipient_restrictions set to this: ...
1
vote
0answers
24 views

Alias with all users in mysql table for postfix/dovecot

I have a table with users for my mail server. This table for imap authenfication in dovecot: +-------------+------------------+-------------------+------------------+------+------+--------------------...
-2
votes
2answers
74 views

How to route mail server from both internet and intranet? [duplicate]

We have a mail server configured in Ubuntu 12.04 with postfix, dovecot and roundcube. It has two interfaces, one with real IP and one with private LAN IP. Incase of intranet we have branches and head ...
-3
votes
2answers
99 views

Setup scalable email server [closed]

I spent last week setting up email servers with trying all MTA and I was able to send and receive emails with attachments and do spam filtering. Now my concern is what if I got too many users and too ...
0
votes
0answers
40 views

Create alias with all users from mysql table in postfix/dovecot

I have a table with users for my mail server. This table for imap authenfication in dovecot +-------------+------------------+-------------------+------------------+------+------+---------------------...
3
votes
1answer
193 views

Should Postfix run chrooted if it already is in it a FreeBSD jail?

I'm running Postfix together with Dovecot and a few milters in a FreeBSD jail. Is there a significant security gain when I run SMTP and SMTPD daemons chrooted as well?
0
votes
0answers
47 views

Postfix - dynamically change header

is possible to dynamically change an email's header by another header line? Let me explain, our email's header looks like this: Message-ID: <199053566811.1335534.134452893157927.JavaMail....
1
vote
1answer
106 views

Postfix can't send mails to google server -> FROM GOOGLE SERVER

Hy, i have a "compute engine" hosted by google. When i try to send an email via postfix, it doesn't work. Error log says: postfix/smtp[16416]: 16C5820035: to=< some_gmail_mailadress@gmail.com>...
0
votes
0answers
37 views

Postfix - master.cf - Share settings

I would like an authoritative answer on whether I can share settings as described below, from someone who has set up a production grade postfix server. The goal is to only apply spamassassin ...
3
votes
1answer
169 views

correct order for Postfix milters

I use the following milters with Postfix: ClamAV, OpenDKIM, OpenDMARC, Rspamd This is also the order they are being called via smtpd_milters. What would be the best order for them regarding ...
3
votes
3answers
228 views

Postfix sends to FQDN Hostname instead of Domain Name

I have installed a send only postfix. Postfix works when I send a mail to a full email address. However, if a mail to sent to a user, it adds the FQDN name as the extension instead of just the domain ...
0
votes
1answer
45 views

Postfix - MySQL - noreply custom response not working

I'm trying to get a custom response working for no.reply@example.com and I keep getting "User doesn't exist" errors. I have an alias of no.reply@example.com which has a 'goto' of the same value, then ...
0
votes
1answer
223 views

FreeBSD & Jails: Send mail through Postfix in Jail

I have FreeBSD 10.2 and I'm using several Jails, one of them has Postfix installed. I want my other jails and my host system to use the local Postfix installation in the Jail. They should use ...
0
votes
1answer
36 views

Email address masking

I would like to mask/alias the email addresses of my customers behind my own domain(ex: custid@mydomain.com) such that any third party (that is allowed to contact them) cannot get their real email ...
0
votes
1answer
198 views

IMAP authentication issue with roundcube + postfix + mysql + ubuntu mailserver

This problem is driving me insane and I'm now stumped. Need some help please ;) I'm setting up a mail server on an Ubuntu 14 AWS EC2 instance using mysql backend, postfix MTA and roundcube webmail ...
1
vote
1answer
335 views

Postfix “Connection timed out”

I try to send a few emails, but postfix send only 3 emails every 10-20 min. After that postfix sends 3 emails, I get the error: "Connection timed out". mail.log: Jan 4 12:16:39 mail postfix/pickup[...
0
votes
2answers
90 views

Postfix sent mails are bounced or go to spam

I recently tried setting up a mail server to be able to send mail for the websites I host with apache. At first I tried to work with exim but I was overflown with error messages and mails I tried to ...
1
vote
0answers
115 views

How to detect SMTP AUTH attempts in Fail2Ban?

I have a Fail2Ban jail that monitors failed SASL authentications to my Postfix SMTP server. When this occurs, /var/log/mail.log contains these three lines: postfix/smtpd[32591]: connect from unknown[...
0
votes
1answer
46 views

Setting up a simple email forwarder on EC2 [closed]

I'm migrating my personal website to be hosted on EC2. I've got the website part of it up and running, but I'm stuck getting the email server setup. All I'm trying to do is receive a small volume of ...
7
votes
3answers
190 views

Is SRS rewriting absolutely necessary for a forwarding mailserver?

I am operating a Postfix email server for my domain, say mydomain.com. It mostly acts as a forwarding email server: users receive an email address @mydomain.com, but usually elect to have their ...
3
votes
1answer
170 views

In postfix, how can I allow only certain users to send mail as any other user?

My mail server's default configuration uses the reject_authenticated_sender_login_mismatch setting of smtpd_sender_restrictions to prevent an arbitrary user A from sending email as user B (in the FROM ...
6
votes
1answer
564 views

How do I get off Mimecast's greylist?

Emails from our servers sent to Mimecast are being "temporarily rejected" due to greylisting. Mimecast has docs on this; they say that every time they see a unique IP and sender, they greylist the IP ...