Questions tagged [postfix]

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` (non-default content of main.cf) and `postconf -M` (content of master.cf)

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35 views

New install of postfix can't send mail

Hi I'm using debian 8 and I'm trying to set up a mail server for the first time. I can't get it to send email. I checked syslog and I'm getting these messages: Jul 13 06:26:34 davidzuccaro postfix/...
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Relay access denied

I installed postfix / dovecot in my aws ec2 instance for my domain, and since it can't access the port 25 blocked by AWS I configured AWS SES relay server on /etc/postfix/main.cf **smtpd_tls_cert_file=...
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Postfix Multi Instance - Test connect to secondary instance from external Email xlient to send emails

Problem: I'm trying to achieve sending and receiving Emails through the same server over domains email.domain1.us and email.domain2.net with authenticated users and being able to receive email as well....
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Configure postfix to strictly check for syntax errors

I am adding email support to my application. I am using postfix to send email by calling the sendmail compatibility interface and writing to standard input. This works great but occasionally emails ...
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65 views

“Unknown user” bounce from Postfix with multiple domains on a single server instance

I'm setting up a Ubuntu server and am using Postfix for my email accounts. This server will host several different domains which I've set up each with a corresponding virtual server and home directory....
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postfix/dovecot: email actually does arrive, but “mail” commands says “no mail” for me (plus from field issue)

Ubuntu 20.04 LTS on a static IP connection. I have setup postfix and dovecot to use Maildir/. I can send messages (although, the reply address on recipient's end isn't right) and I can and do receive ...
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53 views

Catch-All Email Account in Postfix nok [closed]

I have two postfix server: dmzsrv as gateway for external mails mailserver for local mail On dmzsrv I had this entry in main.cf: soft_bounce = yes and on mailserver I two entries in main.cf: ...
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Postfix After-Queue Content Filter Bcc isn't working

I'm piping all sent and received mails with my Postfix/Dovecot mail server. master.cf smtps inet n - y - - smtpd # run script when sending emails from IMAP/POP3 ...
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21 views

Does postfix handle legal emails like “test@other”@example.com correctly?

The email address "test@other"@example.com is a legal email address. Lets assume my mail server has domain example.com assigned. I can successfully sent e-mails to the e-mailaddress from any ...
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26 views

postfix/master[1908]: warning: /usr/libexec/postfix/smtpd: bad command startup — throttling

I'm getting this error message for quite sometime and unable to find I exactly missed in the postfix mail configuration. Please see my master.cf and main.cf below. MASTER.CF Postfix master process ...
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30 views

iRedmail cannot send Email to outside networks “Connection timed out”

After a successful installation of the mail server with iRedmail installer, I cannot send Emails to the outside networks. I can successfully receive mails, but I cannot create a new mail (to the ...
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48 views

Sending through Postfix fails from a new server. Any troubleshooting suggestions?

Background My organization sends list emails from the Mailpoet plugin in Wordpress, hosted on a Linode VPS. We have a second VPS with Postfix installed, which is used as the SMTP server for Mailpoet's ...
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Postfix send mail only to GMail, all other domains are deferred and not sended

My Postfix server is running on Debian Stretch. It is able to send emails to a GMail address without problems which are not considered as spam. At the DNS level I configured DKIM, SPF and DMARC and ...
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How do you diagnose the steps of opendkim

So I've been spending a few hours today upgrading the server I work on to sign emails with DKIM using opendkim and postfix. It actually works! The problem though is when I use a tool, such as the ...
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Postfix: allow unlisted sender only for a specific IP/Application

To avoid backscatter emails, on Postfix I set: smtpd_reject_unlisted_sender = true But this prevents the Odoo from sending some particular emails, since it uses some custom aliases as sender: ...
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Postfix read header info and write in body

by forwarding with DKIM and SPF i change the FROM: to the postmaster address. but for answer the Mail, I need to know the original FROM. is there a ay, to read the FROM before change and post it in ...
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25 views

Postfix: reject_unknown_client_hostname doesn't effect in main.cf, nor in master.cf

I'm trying to set smtpd_client_restrictions = reject_unknown_client_hostname to prevent a lot of spam connections, like postfix/smtpd[28054]: connect from unknown[185.143.72.16]. I set this value in ...
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Postfix: How (and why) set up /etc/aliases.db?

I have postfix set up and a local user myuser. An email to myuser@mydomain.com is arriving without problems, so the basic postfix setup is fine. I have then set up virtual alias: mylongname@mydomain....
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58 views

How can I fix emails being marked as spam after being edited by Postfix?

Recently, I set up a Linux server running Postfix that I'm using to send and relay emails. I've also set up an email address that's used as an alias and forwards the emails to another email address, ...
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1answer
18 views

How can I replace part of a body with an empty string using Postfix?

I've set up a Linux server running Postfix that I'm using to send and relay emails, and one of the tasks that my mail server does is take incoming emails that are sent to specific addresses and ...
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1answer
28 views

Is it possible to append to Postfix default parameter values?

I'd like to append to the default Postfix value of local_recipient_maps, defined as: % postconf | grep '^local_recipient_maps' postconf: warning: /etc/postfix/master.cf: undefined parameter: ...
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68 views

postfix smtp slow to send from clients (and sometimes does not authenticate), works fine with 'squirrelmail'?

I inherited a long time working postfix with courier imap box that runs run of the mill smtp. It seems to use fail2ban for firewall protection of some sort (never used fail2ban) and according to /var/...
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52 views

Dependency Error Installing Postfix 3 on Centos 6

I'm trying to upgrade to Postfix 3 on Centos, using these instructions: https://www.ryadel.com/en/postfix-3-install-setup-linux-centos-for-sending-mail-smtp-smtps-starttls/ However, I'm getting the ...
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28 views

Why doesn't postfix start-fg populate /etc in chroot jail?

I've created a docker container that runs postfix in the foreground using postfix start-fg. It starts fine but is having trouble resolving hostnames, which I think is due to that /var/spool/postfix/...
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Postfix server didn't send emails to the final destination

I have domain let say "example.com" with two Redhat VMs "Clinet1.example.com" and "Client2.example.com", i installed postfix server "server.example.com". i made ...
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26 views

Run incoming mail through PHP script - Postfix

I have followed this answer Pipe all Postfix email for a domain to PHP script - Centos7/EC2 to direct incoming mail for a specific address to a PHP script. My aliases file entry looks like: mail-...
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1answer
23 views

No route to host and Connection timed out

I try to install Postfix to use it with PHP. I did the installation with this tutorial: how-to-get-php-mail-working-on-ubuntu-16-04 I sent an email but nothing happens. When I look to mail.log, I get ...
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9 views

cyrus-sasl doesn't load extensions

On my VPS which runs CentOS Linux release 7.8.2003 (Core) I installed as following. yum install -y cyrus-sasl cyrus-sasl-devel cyrus-sasl-lib cyrus-sasl-md5 cyrus-sasl-plain And the installed files ...
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1answer
160 views

postfix: custom relayhost for any-subdomain of a specific domain?

What is the right way to add a different relay for "from" email addresses with a specific domain and any subdomain for them? Or in other words, what am I doing wrong? How would you change ...
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20 views

Postfix/dovecot/thunderbird (invalid settings)?

I just set up a Postfix/dovecot system (following the below tutorials) and am trying to connect to thunderbird but im getting the error "unable to log in at server. probably wrong configuration, ...
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46 views

Postfix not printing all the status=sent logs in /var/log/maillog?

We have configured a postfix mail server, it takes email IDs from a CSV file, which has 13,500 recipients. The email is sent to all the recipients at a time, but in /var/log/maillog we only get around ...
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9 views

Postfix configuration implication for different hostnames

I recently setup a mail server using Postfix, Dovecot, and MySQL on Ubuntu 18 on a GCE VM. I followed the instructions on this guide, with a few minor modifications. Essentially, what I'm trying to do ...
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1answer
65 views

Building a groupware solution (Postfix, Dovecot, Roundcube, Z-Push) [closed]

Trying to build a lightweight groupware mail server that supports: Mails Calendars Contacts So far my build consists of the following: Postfix (SMTP) Dovecot (IMAP & POP3) Roundcube (Webaccess) ...
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47 views

Incoming emails are not visible Postfix

After 3 days I've decided to seek some help with postfix. I can send emails but I don't see the inbound emails! First it was working into Queue, when I tried to fix it to deliver to the right inbox it ...
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1answer
36 views

utf-8 using exchange behind postfix workaround?

We have a problem with mail bouncing due to UTF-8. we have a smtpin (postfix) --->KEMP load balancer ----> exchange 2013 We have a company that needs to send mail to some of our users and they ...
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1answer
42 views

postfix in a jail how to notify blacklistd running in main host

I have postfix compiled with blacklistd support running in a jail. On the main host (FreeBSD 12.1) blascklistd is running with this config: # Blacklist rule # adr/mask:port type proto owner ...
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66 views

Load balacing email servers: MX vs A/AAAA vs Anycast IP

I'm curious about what are the differences and considerations when implementing email server load balacing between these three methods: Multiple MX records with the same priority/preference number ...
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1answer
24 views

Postfix outbound mail not working

Im having issues with outbound mail on my postfix server. postfix is managed via virtualmin/webmin. incomming mail works great with no issues. when i try to send a mail to any external address i get ...
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72 views

PHPMailer stopped working. Postfix SSL alert number 45

PHPMailer worked fine until June 1st 2020. The SSL certificate for the site sending the email is valid from June 1st 2019 to June 1st 2021 and is accepted fine in the browser, but postfix suddenly has ...
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Postfix catch-all exceptions in /etc/postfix/virtual

I've looked at some previous answers but they don't directly answer this question. If I have /etc/postfix/virtual like this: me@me.com me @me.com me How can I add an exception so spam@me.com goes ...
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1answer
56 views

Spamassassin don't check my mails

I've a problem on my debian 10 server. Spamassassin don't inspect my mail (I've check the headers and send mail spam tests from other domaisn) . The spamassassin daemon is running but something is ...
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1answer
90 views

Postfix - Relay incoming email only to certain domains

We have an old zimbra server as the company mailserver, which does TLS1 only. Let's call zimbra for MailServerA. To fix this (and sort out some security issues), I'd like to setup a postfix server to ...
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42 views

Postfix just stop working and become masked

i have a problem with postfix. I now have a freshly installed Ubuntu 18.04. I install Postfix and during the installation, I say that the mails should go out via a relay. Because the proxy accepts ...
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1answer
474 views

postfix - error sending email

When I try to send an email using mutt (and msmtp) i get the following error: msmtp: envelope from address qorg@vxempire.xyz not accepted by the server msmtp: server message: 530 5.7.0 Must issue a ...
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38 views

Postfix not send emails to remote MX Record (same domain in localhost)

I have a domain with mydomain.com configured in a postfix server, these domain have configured MX records to Google Suite In the postfix server i have the user: user1@mydomain.com In Google Suite ...
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1answer
25 views

How to get gmail to use postfix as an SMTP server

I'm trying to get gmail to send email from my vanity domain - it understandably wants to use an SMTP server set up for that domain. I tried to configure postfix to be an SMTP server for my vanity ...
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2answers
25 views

migrating emails from old server to new server

(Bear with me, the whole idea of email setup is new for me) I have a server configured with postfix, dovecot and roundcube, everything is set u correctly. On the old server (Also using postfix), all ...
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13 views

Postfix relay queue filled with bounces from non-existing users

I'm in a specific situation where my Postfix relays mail between the internet and a backend MS Exchange cluster. The MS Exchange cluster always responds with 250 OK, regardless of what the recipient ...
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1answer
25 views

postfix is unable to receive emails from some domains

I am running a postfix/dovecot email server. The OS is Ubuntu 18.04. I am also using aws as relayhost to send emails as port 25 is blocked. It is working fine except I am not able to receive emails ...
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47 views

Postfix SMTP sends to localhost, even when MX points to Google Apps aspmx.l.google.com

I have been looking for days for this solution. My CENTOS7 Postfix sever (with Virtualmin, Virtual users) is working fine with the mail services. All its domains. However, one of my domains which only ...

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