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Questions tagged [postfix]

Postfix is a free and open-source mail transfer agent (also "MTA"), written in 1997 and still actively developed.

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dovecot oauth2 strange error

i have set postfix+dovecot to work with an external authentication server (keykloak) using ouath2 in dovecot but sometimes i get this strange error that i don't understand May 18 18:50:11 mail dovecot[...
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bounced status email postfix

I wanted to created a send-only mail server with smtp access for my laravel project , so i have installed postfix and add a spf record to my dns but i get this massage from postfix logs when im trying ...
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Why can't I get Postfix to deliver mail to Dovecot?

master cf main.cf I'm having trouble configuring Postfix to receive email on vpn.vietfeir.com. The links above are to the master.cf and main.cf configuration files. I can send mail Port 587 is open ...
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How am I supposed to set up Evolution for local email sending using Postfix?

I want to be able to use Postfix and Evolution to send email between users of my laptop! I have Postfix set up as a Local Only mail server, and have the domain named as penguin.local. Is there a way ...
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How to get Postfix and Dovecot working with an existing Kerberos realm?

I now have a Kerberos realm like MYDOMAIN.CH, an admin server and a principal of root/admin, as well as the realm master password and the root/admin principal password. Now I want to get Kerberos ...
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Postfix use distinct client certificate for upstream server

I have tried to read through the documentation of Postfix TLS support http://www.postfix.org/TLS_README.html here. There is a large amount of flexibility in the smtp_tls setup especially with ...
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Dovecot LMTP Permission Denied Error

I am having permission issues with dovecot that all started with updating Ubuntu to 21.10. I am using virtual users and mailboxes under /var/www/mail/{user}/. I am able to send mail all day long but ...
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Outgoing emails are not signing with DKIM

I have set up Postfix and OpenDKIM and I am trying to get outgoing emails signed by DKIM so that providers won't mark it as spam. However, even if I believe I set up the signing properly, none of the ...
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Two-piece mail server, working out sender_login and verified_recipient validation

TL:DR I'm trying to figure out how to get one postfix server to ask another whether a incoming email's recipient address is valid, or if an outgoing email's sender address is a valid email/alias for ...
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Is it possible to have a custom photo/profile picture on a Postfix mail server?

Something like the example pictured below would be what I am looking for (the little cup of coffee to the left of the sender name and email) I couldn't find any information anywhere, ideally id like ...
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Postfix - add result of lookup to message headers

I face seldom problem and found I can't figure out the way: I have a file of subnet and its name (branch office subnet and office name, so to say), and I need Postfix to add some message header that ...
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unauthorized access to dovecot services

Recently i was enable mail-relay to 3rd party tool, suddenly i found 1000 of emails are going as a spam everyday to unknown users i disable the mail-relay ,but still we facing some one login our ...
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Mail from Postfix not in "Sent" folder

When I send an e-mail from my local computer from Thunderbird, all my e-mails show up in the "Sent" folder on the Fastmail website. But when I send an email from Postfix from my Ubuntu ...
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Postfix and Dovecot Virtual Mailboxes

I have been setting up a home mail server on my Raspberry Pi using Dovecot and Postfix. This is all very new to me, and I've struggled my way through. Now I'm on to trying to setup virtual mailboxes, ...
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How to allow specific email sender to send only as specific sender(s) when authenticating Postfix against LDAP?

In my Postfix config, I have smtpd_sender_login_maps pointing to a file ldap-senders.cf that contains the following: root@mail:/# cat /etc/postfix/ldap-senders.cf bind = yes bind_dn = cn=...
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postfix/dovecot on ubuntu Thunderbird client can't save messages to sent folder

My problem is that TB can't save messages to the Sent folder In users home directories there are mail folders which in turn have Maildir folders so the actual mail directory for users is mail/Maildir ...
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How to create subfolder on mailbox trough Dovecot

On a CentOS 7 machine running Postfix and Dovecot how would one create subfolder named 'Bulk' in a inbox? Like 'INBOX.Bulk'. I thought to use the maildirmake command but this returns "maildirmake ...
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All Postfix configurations with file expansion

Postfix in Debian has some ways to set a configuration, like: myorigin = "foo" myorigin = $myhostname myorigin = /etc/mailname See that myorigin supports both a string and a file. In the ...
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Thunderbird/email server slow when firewall is up

In short, I'm running Postfix and Dovecot on a server and everything is working. The issue is that when sending mail with the firewall up, Thunderbird hangs for about 10 seconds before sending a ...
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Postfix DKIM applied to messages sent locally but not remotely

I've got Postfix running normally on a server. I can send email from it LOCALLY, and I get the typical mailed-by:domain and signed-by:domain mail headers that Gmail uses to show a verified email. My ...
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How to set origin of mails in postfix? (/etc/mailname set but not used)

I've setup a postfix server on Ubuntu 20.04 and sending/receiving mails works fine. But sent mails end up in spam because the sender address is just user@server where server is the local hostname of ...
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How to make Postfix ignore leading whitespace in virtual alias table format?

The virtual alias table format of Postfix gives special meaning to leading whitespace under certain conditions: multi-line text A logical line starts with non-whitespace text. A line that ...
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Postfix & Mailtester Bad DNS & MX Records

I have another thread open here: Postfix not sending to gmail [added spf & dkim] I have following issue: mail-tester is telling me i have no mx and a record but this is not true. So i think i have ...
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Postfix not sending to gmail [added spf & dkim]

Hello i've been struggling for a while now. I will give all the details i can. OS: Ubuntu 20.04 Server: DigitalOcean (Droplet) Domain Registrar: Namecheap I hope i did not change up somethings with ...
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Postfix: inbound and outbound relay with store and forward - advice needed

My ISP blocks port 25, so I'd like to setup a store and forward inbound and outbound postfix server (relay-server) that communicates with a mailstore server (mailstore-server), which is unable to ...
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Postfix don't send mail to external domain

Hi my postfix server can send and receive mail only from my local domain. root@vps-9c0d7878:/# root@vps-9c0d7878:/# postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases ...
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How to send HTML email from file with sendmail and postfix

I have a file with several lines as shown below. Every 4 lines of the file is one email in queue ready to be sent. I intend to send them with the command: head -4 $file |sendmail -t Each email is ...
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Configure postfix for external SMTP

I have a PC at home with Manjaro, connected to the internet through a MODEM that an "internet service provider" has installed for me, from which optical fiber goes out to the world. My ...
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Difference between SMTPd and SMTP

Hi can someone tell me what is the difference between the SMTPd and SMTP ?? i found that smtp is Postfix SMTP client and smtpd is Postfix SMTP server is this real ??? I found other information : ...
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header_checks is applied to mail body (CentOS 7 + Postfix 2.10.1)

I have received SPAM e-mail, added regular expression to header_checks about it and when tried to forward SPAM e-mail as attachment, then this check triggered and rejected my forwarded e-mail. Regexp ...
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Postfix access and subdomains?

I am trying to include in my /etc/postfix/access some domains from known spammers I would like to block (please no discussion if this is useful or not....). Accordings to the documentation it should ...
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Prevent use of procmailrc by some users

We have an e-mail server running Postfix (SMTP) and Dovecot (POP/IMAP) on Debian 10. Users cannot log directly on it (SSH), but have access to their homes through NFS. We would like to use Procmail to ...
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FInding 'server log' referred to in this postfix error

This is a bit embarassing, but I'm stuck at the first step of debugging a postfix+dovecot setup on Debian after following this guide. Sending email from my server works, but receiving doesn't. I get ...
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Postfix non privileged docker image

We are trying to create a docker image for postfix similar to this one here. Later we want to use it as part of a kubernetes deployment. Therefore the container needs to run as a non-root user (...
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Unclear about postfix and hostname in ubuntu

I need to preface this by saying I am in no means an expert with linux or servers. I have a digitalocean droplet that I am using as a webserver for a couple of domains. I am looking to implement a ...
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Postfix: Allow sending only from virtual users used by dovecot

So I have set up my postfix server with dovecot according to this tutorial. Receiving emails works fine, sending them too. But these days I had the problem that my postfix started sending emails from ...
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Not receiving emails (no bounced errors) but can send out emails - Postfix, Dovecot, Webmin/Virtualmin

I'm using CentOS with Postfix, Dovecot, Webmin/Virtualmin. I can't seem to receive emails for all addresses for one of our virtual servers configured via Webmin/Virtualmin. But I can send out (and it ...
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Postfix Dovecot Pi server cant connect to email client even though it can send and receive emails

I followed the sam hobbs tutorial for setting up a postfix dovecot email server on a pi and with quite a bit of research and trouble i got my pi server running (can send and receive emails), but i ...
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postfix in docker cannot resolve hostname of relay host

My postfix instance running in a docker container seems to be unable to resolve the hostname of my relay which is outbound.mailhop.org (formerly Oracle and now owned by DuoCircle). Relay fails with ...
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Roundcube issues after server upgrade (Debian 10, PHP7)

I have upgraded my DigitalOcean droplet from Debian 8 to Debian 10, as well as upgraded PHP from PHP5 to PHP7.3. I also upgrade RoundCube to 1.4.2. Everything seems to work fine. I see no obvious ...
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How can i view mail using doveadm?

I have mail sent to my dovecot inbox and I can see that there are unread emails. If I run: doveadm -f table mailbox status -u bob all INBOX I get: mailbox messages recent uidnext uidvalidity unseen ...
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postfix on the cloud without mydomain

I'm trying to make postfix server on a cluster (docker swarm). The postfix main.cf configuration needs mydomain but I'm not using a dedicated machine to domain name. I have 10 machines and 6 domains. ...
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postfix running but not accessible

I've got postfix running (or so it seems) on my Debian 10 system: user@leah ~ # service postfix status ● postfix.service - Postfix Mail Transport Agent Loaded: loaded (/lib/systemd/system/postfix....
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Postfix + Cyrus not working

I have a problem. I have configured postfix for run with cyrus, and it's still not working. /var/log/mail.log Nov 29 10:44:24 mail postfix/submission/smtpd[32229]: connect from out.example.com[xxx....
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bash: printf to email Fails, Redirect Succeeds

When I pipe the output from printf to mail, the email does not get sent. When I write the output to a file and redirect input from the file, it works. e.g. I have a bash script with the following: ...
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Relay access denied with postfix when receiving mail

Introduction I recently installed postfix 3.3.0 on an Ubuntu 18.04.3 LTS virtual machine. To test the installation, I am using out-of-the-box configuration, which means I did not change anything yet....
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what's the difference between using RBLs and anti-spam software?

My doubt is, is it too different to use RBLs instead of anti-spam programs? (like SpamAssassin) I've a Postfix + Dovecot server with some RBLs in Postfix, and disabled SpamAssassin because it was ...
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Postfix is forwarding/relaying spam

I have an Ubuntu 16.04 machine with Postfix 3.1.0 and virtual mailboxes (iredmail). I'm using postscreen (with a local Bind server), Amavis with ClamAV and SpamAssassin. The amount of received spam ...
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Linux Mint Postfix connection refused

I'm trying to create a server on Linux Mint (Cinnamon 19.2) for HTTP (Apache2, Mysql5.7, PHP7.2), FTP, and Email (Postfix, and evetually Dovecot and SquirrelMail or RoundCube, but after I get Postfix ...
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Make postfix use sasl / auth plain for outbound mail to a relay server

My postfix does not send AUTH PLAIN to the outgoing relay server. It must have worked a couple of days ago, but now I get "relay not permitted" bounce mails. The mail system runs in an Alpine Linux ...
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